Reposting this here because you might just need virtual RAM, I added 2gb and it sorted everything. I think.
I can’t pinpoint 100% what the final solve was but after reinstalling the game for a 2nd time I did the ‘battery thing’ (make sure battery saver isn’t closing apps as you leave them) Did that for the Google apps as well (I did it in Chrome via browser for me) and then before I opened the app for the first time after all this I tried something totally random… I added 2gb of virtual RAM (I have a Redmi note 11 Android 13) and when I clicked past the guest log in and tried ‘Log in’ again, the game didn’t seem to close this time when returning from browser (after clicking three little dots) and I’m in!!!
So like I said, not entirely sure but one of those things definitely changed something!
Have a great rest of the week, and good luck peeps! Hope this helps, even if it’s just 1 of you!