Low memory, apps crashing - change zram settings or add swapfile? [4.x]

It could be that I am observing app crashing as well as described in this thread: Android app background execution - #13 by tombln

The app (komoot) runs for a while in background, but at some point, when I reopen it, it appears to be freshly started/reset.

Would those be symptoms of crashed/forcefully stopped android apps? I have not yet found a way to have the app run for a longer time in the background, it reliably crashes/resets after around 15-30min in the background.
On a 10 ii that is.

I don’t have any other apps except Fernschreiber running, and on the android side only MicroG. So I am not sure how this could be caused by memory issues? What do you guys think? Is there a way I could figure out if it was caused by memory issues?
Maybe I could just start a bash loop which prints memory usage into a file every x seconds and see how it went during the crash?

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