Doorbell Wired WiFi channel 7 disconnects

Why is it when my Fritzbox 7590AX router changes its 2.4GHz channel to 7, the doorbell wired looses connection.
After a few weeks of unplugging the doorbell a few times and a factory reset I then noticed the AX version of the 7590 changes its channels more often than the non AX 7590 (probably due to newer firmware) and this is when I discovered the disconnects happen on channel 7.
It has good wifi strength and no problems with the other channels.
I am in the UK.

Hi @paulliewallie. You have tried the basic troubleshooting steps I would have recommended. The next best step would be to give our support team a call to further assist with your concern. Give our support team a call using one of the numbers available here.