I think I found a bug where trying to add a background using the camera on the laser tool head results in one of the sections being out of whack. The tool head starts at the upper right quadrant rather than upper left.
I had done a background minutes before & worked fine; but when I went to actually engrave I got the popup about the newer version available. I upgraded then had the problem.
I deleted the 4.3.1 version & downloaded 4.3.0 & the background function works fine now.
This is a Snapmaker 2.0 A150 with latest firmware.