Google Cast not working on Nest Hub

Hi there folks,
I’ve created a dashboard for showing on my Google Nest hub. I’ve tested this on the Google Chromecast and it was working like a charm. Suddenly the casting stopped working. This screen now always shows the HA logo with a hearth and then the Nabu Casa logo. It says 'Not connected.

When I go to cast.homeassistant.com and start the casting it say’s ‘Connected’ and shows my dashboard for a short period. Then it goes back to ‘Not connected’. I thins this the automation failing to stream to the cast while taking over the casting from cast.homeassistant.com.

Anyonw experiencing the same issue and more important did someone was able to fix this issue?
In the meanwhile I also upgraded my Raspian OS to Bullseye.

Tips would be welcome!
Regards Lucas