Later shift maybe?
Just ran into an issue today when tuning my VC4 500. Where the printer almost forgets where it is and starts printing in a off set location.
I've attached a photo. But has anyone ran into this before?

4 Replies
Double check that your drive pulley grub screws are fully tightened
And tightened against a flat on the motor shaft (if it has one)
I had this issue with orca slicer. I went to the next beta release, it fixed it.
I'll give that a shot. Thanks