Horrible bug..

I've had this bug for about 2 times, before I just got it again yesterday.

I spent hours on making an A and a B - piece for a track ("A01" and "B01")

I flip around the 2 sequnces and suddenly, without any warning, A01 is B01 and B01 is still B01. So I now have 2 B01, and A01 is just gone for good. so I had to start over from my last save, which was the day before... This is a real cruel one and i cant recreate it - Has anyone ever tried this??

I never had that but I hope nothing like that ever happens to me ouch. I use the 1k live and if I get any bugs on a given night thats it for me.