I am new to using Krita and could use some help. I am on a Samsung Galaxy Tab S6 Lite and when I try to open a .kra file in Krita it loads, flashes the image I opened, then turns all black. Also of note, it doesn't do this with all .kra files, just ones I've put time and effort into, e.g. not files made quickly just to test the bug.

You'll have to share the actual files so we can do some testing, but keep in mind that you're using something that we very clearly mark as BETA. Krita on Android is NOT suitable for production use, it's a a proof of concept that you can play with.