TimeMachine - adding network volume - no change of account name

Aloha,

In addition to the different already described TimeMachine problems under MacOS Sequoia there is another inconsistency emerged.

First of all, I also had noticed that the Timemachine backup could not be completed on my network volume.

Then I removed the network volume to add it again in the next step.

The volume appears as expected (picture 1), but if I want to enter my specific registration data or the password in the upcoming dialog (picture 2), no changes of entries are possible there. Any keyboard inputs are ignored!

Does anyone have a similar problem and can confirm the behavior?

And/or is there any idea for a solution?

Thank you.

Kind regards,

Yose.