When opening text files (most, but not all) from the Android app, I get the message “Loading takes very long”, and the file won’t open. Downloading the file to the phone works though. If I then delete the local file, the issue is back again.
Same issue with Nextcloud 19 and 20. Latest Android app version.
Sometimes disabling / enabling the Text app in the NV server helps, but the issue comes back again.
It’s similar to this: https://github.com/nextcloud/text/issues/742
I’m using Let’s Encrypt cert for the NC FQDN