DDJ 1000 / SONGS DRIFT AWAY EVEN WHEN BPM EXACTLY THE SAME

Hi, I have a DDJ-1000 and tracks always drift apart after a while even after being beatmatched perfectly.... And I know what ya'll gonna say that this happens because decimals and quantize and ETC.....

but this happens even when playing the SAME song without any change in speed and beatmatching them by ear, they drift apart, even while using beatsync with the same song they drift apart, songs always drift apart no matter the bpm, grid, quantize or anything I do, they still drift apart after a while and I have to constantly move the jogwheel..... this is really annoying specially with drops....

I'm using Windows 64 bits

rekordbox 5.8.7