Sophos XG 17 RC1 - Can't login as Admin or User

Hey guys,


since beta 2 I have a sporadic problem with the authentication. After 2 days at the latest I can't log in to the admin interface, user portal or web authentication. The firewall practically freezes.
At the admin interface I get an error message that the login process failed. With incorrect credentials I get the same message.

When logging in to the User Portal or web-authentication I get no error message, only the loading graphic rotates with no result.
Logging on to the console is possible, but I cannot select an entry (1-7). The only fix is to reset the firewall.
I can't find any events in the syslog.

The XG firewall runs on an ESXi with 5GB Ram. In addition, a RED has been created and the user authentication runs via a domain controller.

While searching in the forum I came across older topics, but without a solution. Does anyone know the problem?

Regards