Are you using a down cut bit?
actually, I had the same problem just today.
Happily cutting along and after about 1/2 hour it just stopped, raised up, then went back down and continued.
Sounds like it’s breaking the profile into 2 separate tool paths, as if there was a break in between.
Definitely sounds like a glitch, they must of hit something with all the changes they’re making.
I use V carve desktop exclusively.
For what its worth.