Nextcloud has been working very well from 10.x.x to 11.0.2,
but after update to 11.0.3 sync from mobile clients has become unreliable.
during update from 11.0.2 the web-updater failed with “unable to delete directories”, but manual update finished fine.
Web interface and Desktop Client continues to work as expected, but in
Nextcloud Android client auto upload is much less reliable, 1 in 4 photos fail to upload with connection error, and only complete after multiple retries.
third party client “FolderSync” fails with Unauthorized error.
no errors in the logs on the server.
server running on Ubuntu 14 with latest Apache and MySQL.
what should we check?
what extra logging should we enable?