Fritz repeater 1200 connection to router breaks off?

I use my Fritz repeater 1200 to be able to play with my ps4 in a room but the connection from the repeater to the router breaks off for a few seconds every minute, which is very, very annoying. What can I do about it?

First of all, follow the advice of the manufacturer AVM:

Here it is:

https://avm.de/...erbindung/

Thank you helped, thank you very much!