Not sure I can share a demo account on the webdav as it's on a private network. It's the webdav server from Seafile via Apache.
Doing more tests, I'm now almost sure that the bug is in the Windows Enpass cilent. I have the android app, Linux (ubuntu x64) client, and also the Windows client.
When creating a new item in the Android app, it shows up in the Linux client upon sync, but it does not show up in the WIndows client at all, regardless of how many times I sync. However, quitting the Enpass WIndows client and relaunching it, it will sync and then the item will show up.
I seem to notice also that when it was not showing up in WIndows, the icon for syncing kept spinning for a long time ... as if it was stalling. The webdav server was fine and the connection to it was also fine, since it worked instantly after i restarted the windows client