Firmware 2.2.1.210 and connection problems Skybell

Yesterday I manually updated the firmware (2.1.4.16) of my Orbi RBR50 and RBS50 to 2.2.1.210. All devices quickly connected except for my Skybell Trim Plus doorbell. So I reset the router and satelite to factory settings, but the problem persisted.

 

I live in a neighborhood with few houses and therefore have no problem with other 2.4GHz users. I changed the 2.4 GHz channel to 11 and/or unchecked the Co-existence button and/or unchecked the Backhaul button. I also reset the Skybell several times and try to connect to the router again. But unfortunately it did not have any result.

 

So I reinstalled the ‘old’ firmware (2.1.4.16) and within seconds the doorbell was connected to the router. That's why I decided to keep using the old firmware and not update it for the time being.

This morning I saw that the skybell blinked because there was no internet connection again. When I looked at the data from the router, I saw that my router had been automatically updated at 3 am. I have manually installed the old firmware again. Also this time a stable connection within seconds.

That is why I have two questions:
- Does anyone have any tips to solve the connection (I think it is a bug in the new firmware) problem?

- Is it still not possible to switch off the auto update function?

Thanks for your help!