if i regestered a new account. I don't have any problems. After a sort time, with switching to an WLAN and back to MobileNetzwork. The App says me, i have the error code 400 (Bad request). I have Android 6 und deactivate and activate the account does no changes. After activating the error returns. When i delete the account and add the same account it will be correct connetion. But after an other sort time the error returns.
Do you have any questions about this issue or an bugfix, then let me now.