Krsna never interferes with the jiva-soul's "free will," even when they choose to reject Him.

However, even this can change if Krsna chooses because ultimately EVERYTHING is up to Krsna to sanction, or not sanction.

In this way, we must never forget that Krsna is the Supreme Personality of Godhead and cause of ALL causes.

Krsna can do anything He wants, even over-ride the jiva-soul's "free will" if He wants, therefore nothing is to be taken for granted.

Krsna is beyond all rules and regulations, He can, and often does, override the karma (good and bad) of a jiva-soul for reasons He only knows.

This clearly means Krsna is NOT controlled by any rules and regulations, or binded by any laws in both the spiritual and material worlds. 

At any time He likes, He can change anything He likes.

Only Krsna can do this if He wants because He is the Supreme Lord and cause of all causes, and not a blade of grass moves without His sanction.

Krsna knows everything "past, present and future" because He is omniscient.

But generally Krsna allows the marginal living entities (jiva-souls) to express themselves in their own unique way, which means He allows them to have a choice to stay in the ever fresh perpetual spiritual world, or enter the temporary material world. 

So, without any objections from Krsna to follow Him, or not follow Him, the jiva-souls can choose to stay in the spiritual world, or enter the temporary material creation. 

Such choices are based on their individual constitutional attribute of "free will" that every jiva-soul is endowed with and allowed by Krsna when He chooses to do so.

Important point to remind us that Krsna is the Supreme Personality of Godhead and cause of ALL causes.  

Srila Prabhupada - "The "immediate" expansions of the Lord are called svāṁśa or personal direct expansions (Visnu-tattva who are Krsna playing another role in His own pastimes) 

The "separated" expansions of the Lord are called vibhinnāṁśa - (jiva-tattva) or independent jiva-souls like us." (From BG, 10.37, Purport)

In most nearly all cases, Krsna will not interfere with the jiva-soul's free will because He wants a relationship with those who take personal responsibilities for their own thoughts and actions, that allows them to voluntarily contribute offerings in their own unique way.

This is what it means to be an individual who has free will that further enriches one's loving exchanges with Krsna. 

Otherwise one is just a mindless drone who foolishly thinks "surrender" means allowing Krsna to control your every thoughts and actions and only allow Krsna to possess you and take complete control.

The fact is, such so called "surrender" is impersonalism.

Devotee – “When we are in the spiritual sky and serving Krsna, we have a perfect relationship with Krsna, what causes us to fall down in the material world, because we’re already serving Krsna?"

Srila Prabhupada – "Because you desire to fall down. Here it is explained that don’t fall down."

Devotee – "Srila Prabhupada, I can’t understand why we should have an impure desire when we are already serving in Vaikuntha."

Srila Prabhupada – "Because you have got little freedom. Why one is not coming here and going to the liquor shop? It is his desire."

Devotee – "But in Srimad Bhagavatam it says that Krsna did not want us to come to this material world. If Krsna did not want us to come, why are we here?"

Srila Prabhupada – "Yes, you forced Krsna to allow you to come. Just like sometimes a child forces his father. Father says, "My dear son, do not do this. Do not go there." But he insists, “Oh, I must go. I must go." All right, you go at your risk and suffer. What can be done? 

So because you are son of God you have got independence, full independence, therefore you have acquired the quality of your father, so God does not interfere with your independence. 

If you persist that "I must go and enjoy independently," God says, "All right, you can go." This is the position. You have to take sanction. That is a fact. But when you persist, God sanctions. And you come and enjoy." (Melb, Australia June 25, 1974)

Acyutananda – "In the Bhagavad Gita it says, "Once coming to the Spiritual world he never returns to the material worlds, so he can return?"

Srila Prabhupada – "If he likes he can return."

Guru-kripa – "How is it that one can become envious of Krsna?"

Srila Prabhupada – "You have got little independence, you can violate. Because you are part and parcel of God. 

God has got full independence, but you have got independence too, proportionately, because you are part and parcel, so if he likes, he can return. 

That independence has to be accepted. We can misuse that. 

Krsna-bahirmukha haïä bhoga väïchä kare. 

That misuse is the cause of our falldown." (Mayapur, Feb 19, 1976)

In actual fact, without "free will," genuine loving exchanges and reciprocation voluntarily given in a "two-way" relationship would not exist.

Freedom and free will even means having the choice to accept or reject Krsna.

Srila Prabhupada - "Free will means that you can act wrongly. That is free will. Unless there is chance of doing wrong or right, there is no question of free will. Where is free will then? If I act only one sided, that means I have no free will. Because we act sometimes wrongly, that means free will."

Hayagriva - "A man may know better but still act wrongly."

Srila Prabhupada - "Yes, but that is free will but misuses his free will, just like a thief who knows he is stealing, it is bad, but still he does it. That is free will. He cannot check his greediness, so in spite of his knowing that he is doing wrong thing—he will be punished, he knows; he has seen another thief, he was punished, he was put into prison— everything he knows, but still he steals. Why? Misuse of free will. But unless there can be misuse of free will, then there is no question of free will." (Excerpt from: Philosophy Discussions with Srila Prabhupada – Rene Descartes 1976)

Srila Prabhupada – "So everyone can know that independence means one can use it properly, or one can misuse it. That is independence. If you make it one way only, that is not independence, that is force." (Los Angeles, June 23, 1975)

Genuine loving exchanges can never exist if one's relationship with God was not a "two-way" exchange of feelings, but only a domineering "one-sided" affair with "a so called God." 

Srila Prabhupada - "Love is reciprocal, voluntary, good exchange of feeling, then there is love. Not by force! Krsna does not want to become a lover like that." (Washington DC July 8, 1976)

Those scholars who make the ridiculous claim "not even the leaves can fall down from Vaikuntha" because Krsna is in complete control of the jiva-souls, are not understanding the reality of "free will," and that only a "two-way" reciprocal relationship between Krsna and the jiva-souls develops into loving personal exchanges.

In other words, the Spiritual planets are not a "one-way" impersonal dictatorship where Krsna controls every aspect of His devotees like a puppet master controls his puppets.

This also means one's position on the Spiritual planets can never be claimed to be eternally permanent, even though it is the jiva-souls original and natural home.

This is because there is always free will in both Vaikuntha and Goloka Vrindavana. 

This means at any time the jiva-souls can leave if they choose to do so, but most, over 90%, choose to never leave Vaikuntha and Goloka Vrindavana.

Many foolishly claim the jiva-souls can never fall down from Vaikuntha or Goloka Vrindavana, which is correct for over 90% because they choose to never fall down.

However, all jiva-souls can choose to leave at anytime they like due to free will. Therefore it is always their choice and as already explained, most choose NOT to leave the Spiritual worlds. 

Also fall down from Vaikuntha or Goloka Vrindavana is not because of Maya (material cause) because Maya does not exist in the Spiritual worlds.

However, free will, or the ability to make one's own decisions and choices, DOES always exists there.

As said above, Maya and material energy cannot exist in Vaikuntha and Goloka-Vrindavana and tempt the jiva-souls, therefore Maya is NOT the cause of falling down from the Spiritual worlds.

But as said, the ability to choose does exist in both Vaikuntha and Goloka Vrindavana where one always has a choice.

"Surrendering" to Krsna in Goloka-Vrindavana, or Visnu on the Vaikuntha planets, is NOT impersonal, which means the jiva-souls do not have to give up their "free will," individuality and unique personality in order to love and serve Krsna.

In fact it is the opposite, without free will one can NEVER love Krsna.

And what are the symptoms of free will?

It means having the awareness of an independent self, a unique individual personality that is separate from Krsna's Personality, and being able to voluntarily make your own choices in your service to Krsna.

Having "free will" ALWAYS allows the jiva-souls to voluntarily choose their own contributions as a unique offering to Krsna in loving service. 

Without "free will," loving reciprocational exchanges and emotions with Krsna are not possible.

In the Spiritual worlds all marginal living entities (jiva-souls) are nitya-siddha (liberated) personalities. 

But while in the material worlds, those same jiva-souls who choose to enter the material creation, are nitya-baddha (meaning materially conditioned) 

However, our "original position" is always Nitya-siddha.

Srila Prabhupada explains this here,

Srila Prabhupada - "The actual constitutional position of every marginal living entity is nitya-siddha. By following the rules and regulations and instructions of the spiritual master, the jiva-soul can become AGAIN nitya-siddha. So the Krsna consciousness movement is to make the nitya-baddhas AGAIN nitya-siddha." (NY City Lecture on CC, July 13, 1976)

As said above, all jiva-souls are originally nitya-siddha, while nitya-baddha is a conditioned state they fall down to by rejecting Krsna. (either to the material creation or the impersonal brahman) 

Therefore, because of free will, the jiva-souls can choose to enter the temporary material worlds where they are there known as nitya-baddha, or latter on, after being frustrated with material existence, the impersonal Brahmajyoti.

All jiva-souls can choose to remain nitya-siddha or they can enter the material creation as nitya-baddha. 

There are those who believe a class of jiva-souls can never fall down from Vaikuntha and Goloka Vrindavana and always remain nitya-siddha, such an idea is nonsense because that means they have no free will.

As explained above, free will means being always able to choose right or wrong, otherwise you have no free will as explained above.

Only the many Visnu-tattvas expansions of Krsna and Radharani in their many different roles in Krsna's eternal pastimes in Vrindavan and the Vaikuntha planets never fall down.

And includes of course those jiva-souls "who choose NOT to fall down."  

The fact is, the jiva-souls (nitya-siddha) in Vaikuntha and Goloka-Vrindavana, CAN fall down at any time if they choose and become nitya-baddha in the material creation, or later enter a dormant state in the impersonal Brahmajyoti which is also a nitya-baddha condition, but most jiva-souls (over 90% as said above) choose NEVER to fall down.

A pure devotee is trying to remember Krsna by always chanting Hare Kṛṣṇa and praying to never fall down.

Also the jiva-souls have existed for "infinity" which means they are beginningless and endless.

Bhagavad Gita As It Is 1983 "correct edition," Chapter 2 text 12-

"Never was there a time when I did not exist, nor you, nor all these kings; nor in the future shall any of us cease to be." (BG Ch 2 text 12)

Bhagavad Gita As It Is 1983 "correct edition," Chapter 2 text 20-

"For the soul there is neither birth nor death at any time. He has not come into being, does not come into being, and will not come into being. He is unborn, eternal, ever-existing and primeval. He is not slain when the body is slain." (BG Ch 2 text 20, 1983 edition)

 The jiva-souls have existed for infinity, meaning they were never created and are beginningless and endless.*<*