1. Dont know the exact version of the windows app at this time. Guess the store updated it regulary. After the error occured, I installed the website version instead. Android version always up to date (I check for updates daily).
2. I use OneDrive for syncing.
3. All Systems get time updates from either NTP (Windows) or netprovider (Android). Please note that the reverted passwords were changed a few days ago on android before launching the PC version.
4. As stated, I already reinstalled and reconnected the desktop versions, I will continue to observe this.
Error occurred at least on two windows systems.