I press the Update button, it loads for a few seconds, then it shows the Update button again. No error is shown.
Play Store
A similar issue. Update is available, I press the Update button, download completes, installation begins, and installation fails; then a dialog pops up asking me to report the issue (send feedback) to Google.
Workaround
Workaround for both cases: uninstall, then install the new version, and finally restore backup.
It doesn’t happen for all apps. Recently I had to reinstall Syncthing-Fork, Proton VPN and some others.
Phone info
I’m running LineageOS 22.1 (recently upgraded from v21) on a Motorola G32 (devon).
I have the F-Droid Privileged Extension, manually installed by following this workaround (sideloading zip file doesn’t work).
I have Google Apps for Android 15, installed according to the LineageOS 22 installation instructions.
I have Magisk with Zygisk enabled, and the Play Integrity Fix module installed.
My previous LineageOS installation — which did not have this problem — had everything listed above, except the F-Droid Privileged Extension. So that is the primary suspect. But how do you uninstall it?