That is strange. We don’t make any changes to the source. However, it is possible that booting into Windows externally caused something to happen on the internal drive (though I have not seen it happen). Does Windows show high CPU or disk activity?
Thanks for answer and follow up, i chose to make a clone from Bootcamp partition (source) to External Hard Drive (empty), i did not mistake for sure, at that point a pop up appeared asking me to restore/cancel so i first canceled redid the same choice make clone from A to B, same restore/cancel so hit restore. The copy process launched, when it ended restarting the computer in windows mode took a while, restarted several times, and when it worked Windows was really slow… i restart again same problem on launch with a long and several looping and at last it launched ok… now I didnt restarted it in mac ios mode for fear to lose something… what is your idea ? Thanks a hundred by advance !