Whatever caused the sheep to walk away...the lie they believed, the deceit....is the snatching.
Jesus says....they remain saved. They may be deceived...but not taken from Christ Jesus' hand.
In John 10:1-5, it is when believers climb up another way that they wind up following a stranger's voice. This can be applied to believers thinking they can get another drink of the One Spirit in getting tongues which never comes with interpretation. This is the falling away from the faith spoken of in 1 Timothy 4:1-2 & here;
2 Thessalonians 2:3 Let no man deceive you by any means: for that day shall not come, except there come a falling away first,....7 For the mystery of iniquity doth already work: only he who now letteth will let, until he be taken out of the way.
This is Paul explaining how that iniquity of the falling away from the faith was happening even in his day.
2 Thessalonians 2:9 Even him, whose coming is after the working of Satan with all power and signs and lying wonders, 10 And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved. 11 And for this cause God shall send them strong delusion, that they should believe a lie: 12 That they all might be damned who believed not the truth, but had pleasure in unrighteousness.
So those believers that think they can receive the Holy Spirit again with power by the evidence of tongues as they do so by addressing the Holy Spirit Himself to come and fall on them, thus going around the Son in coming to God the Father ( John 10:1 ), God will permit the strong delusion to occur for believing that lie as He who let, will let till He be taken out of the way.
Therefore all believers that have the new age mentality of receiving the "Spirit" again after that sign or other signs in the flesh have fallen away from the faith. Matthew 12:39 & 2 Corinthians 11:1-4 & 2 Corinthians 13:5
This is why Paul remind them when they had received the sanctification of the Spirit and the belief of the truth by the hearing of the gospel.
2 Thessalonians 2:13 But we are bound to give thanks alway to God for you, brethren beloved of the Lord, because God hath from the beginning
chosen you to salvation through sanctification of the Spirit and belief of the truth: 14 Whereunto he called you by our gospel, to the obtaining of the glory of our Lord Jesus Christ. 15 Therefore, brethren, stand fast, and hold the traditions which ye have been taught, whether by word, or our epistle.
Paul goes on to the 3rd chapter in explaining how these wicked, unreasonable men that have not faith, that follow not after the traditions taught of us and are disorderly as those believers are in those movements of the "Spirit", that they are not to be treated as the enemy, but admonish them because they are still brothers.
2 Thessalonians 3:1 Finally, brethren, pray for us, that the word of the Lord may have free course, and be glorified, even as it is with you: 2 And that we may be delivered from unreasonable and wicked men: for all men have not faith. 3 But the Lord is faithful, who shall stablish you, and keep you from evil. 4 And we have confidence in the Lord touching you, that ye both do and will do the things which we command you. 5 And the Lord direct your hearts into the love of God, and into the patient waiting for Christ. 6 Now we command you, brethren, in the name of our Lord Jesus Christ, that ye withdraw yourselves from every brother that walketh disorderly, and not after the tradition which he received of us. 7 For yourselves know how ye ought to follow us: for we behaved not ourselves disorderly among you;....4 And if any man obey not our word by this epistle, note that man, and have no company with him, that he may be ashamed. 15 Yet count him not as an enemy, but admonish him as a brother.
But as in John 10th chapter, there are sheep that were not of the fold that follow His voice and yet He must bring them, because they are His and they will be made to hear His voice and be of the one fold & one shepherd.
John 10:16 And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one fold, and one shepherd.
Is it possible for those that have gone astray to hear His voice finally by His grace and by His help and repent to return to their first love and shun vain & profane babbling to pray normally so that they may know what they had prayed for to give the Father thanks in Jesus's name for answered prayers? Yes. 2 Timothy 2:24-26 There is always a way back to the Bridegroom until that door is shut at the rapture.