Hi Peter,
Sorry to hear the sync is not working for you!
Yes, you can do that back exporting the two files first, closing the Android app, clear the app cache in Settings - Storage - Other apps - Dynalist - Delete storage, and then restarting the app.
We’re still not sure. From the bug reports, it looks like it’s a rare occasion of data corruption, although we haven’t been able to figure out the exact cause. Unfortunately, we haven’t been able to reproduce it or spot any patterns.
If you have any information on that, it would really help our investigation!
I understand that looks related, but it’s not the cause of the issue. This one is a fairly recent bug and will be fixed in the upcoming release.
See: Android stuck at loading animation
I hope that helps!