Open Connection via Context Menu fails if Credentials needs to be chosen

Good Morning everyone,

unfortunately after the last Update (now on Version 2021.2.16.0 64-BIT) I cannot open a connection if I open it via the RDM Context Menu.

This only happens if the credentials for this connections are configured as "Ask on connection" so that I can choose which credentials should be used this time.

So, the Credentials choosing screen comes up. If i click somewhere in this window it disappears including the RDM context menu.

When i start the connection from the RDM Main Window everything is ok.

Someone got a clue?

With best regards.