I’m working on a bug in the adding exif process where there is a memory leak. It depends on how many photos you are trying to upload and how much RAM you have available. On my test device it only seems to happen if you have several thousand photos. It’s an XR though.
It sounds like it’s something else for you though as you don’t have that many photos.
I hope to have a fix ready today and hopefully it solves the problems you are having.