Homematic IP Binding no progress after router update

Hello, everyone. I’ve been using the homematic ip binding for years. However, since the last update (probably since 3.3 M4) I have had the problem that after restarting the internet router, here fritzbox, the binding remains online but no longer receives any data. The CCU continues to operate normally. Only when I stop and restart the gateway thing do values ​​come back. Has anyone else observed this? Use an Intel Nuc with Ubuntu and OH3.3 release. Many greetings,

Probably the same problem as described here: Homematic connection lost when router reboots - #4 by MHerbst