Gigapixel and photo ai cropping problems

So, I can’t crop now in gigapixel of photo ai because it totally distorts the output and ruins the input file if I use it as a tiff.
Been going on a few weeks and driving me nuts.
Have ruined one photo which I could not get back.
Windows pc 12rh gen processor, 32 gigs ram, nvme main drive, all updates applied for windows , graphics driver for rtx 3080 ti and all topaz apps.