core: FRITZ!Box Tools - device tracker broken

The problem

Since 2021.8.0 docker release the presence detector using Fritzbox Tools seem to be broken. HA reports n/a for every sensor. HA and docker logs show nothing related to it. I tested it with 2 different setups of RPI4 with docker and Fritzbox 7490 and 7590. One setup runs the container in network host mode, the other one simply uses normal docker network mechanics.

What is version of Home Assistant Core has the issue?

core-2021.8.0 and later

What was the last working version of Home Assistant Core?

core-2021.7.4

What type of installation are you running?

Home Assistant Container

Integration causing the issue

AVM FRITZ!Box Tools

Link to integration documentation on our website

https://www.home-assistant.io/integrations/fritz/

Example YAML snippet

No response

Anything in the logs that might be useful for us?

unfortunately none

Additional information

Tested in 2 different setups with different RPI4 and Fritzbox 7490 and 7590