Oh, after trying on a new project. I came across the bug and I figured out what triggers it.
I add the tracks with transform, so I got four tracks for transform stuff. Then I click a bone in the top left list, one selection, then I go to the window under it to click the key for anything in transform or the whole transform group key. You can see the blue bone "twitch" like it's offsetting by a pixel. But the image it's attached to stays normal and doesn't bug out. But if you ctrl+click a bunch of bones and do the exact same thing, it'll "twitch" the bones but also the images now, getting that off by one pixel thing when using arrow keys.
I think avoiding doing multiple bones at the same time might work around it for the images attached to the bones, even though the bones are moving a tiny bit, it doesn't seem to mess anything up. But it would be really tedious to have to do bones one by one lmao.
If I didn't explain it well, I can record myself causing it, if that helps.
Would it be possible to get a copy of the last couple versions? I had my old one that's 8.3, which doesn't have the issue, but I did come across another odd bug where certain bones will "wiggle" the image during rotations even during playback. But thought maybe the previous version before 11.1, or two, might let me work around it for now. Going to be using it for most of my game's animations, really excited as it's the only one I've liked so far, especially the UX/layout of it.