INFO: Missing updates for heating groups

[SukramJ]

custom_component/hahomematic version (if applicable):
1.12.5 latest tested version / earlier versions are also affected

Home Assistant version (if applicable):
2022.7.7 latest tested version / earlier versions are also affected

CCU version:

• Model (CCU2/3, Raspi3/4, NUC, ProxmoxVE, HA-Addon ...): all CCU Derivated
• OS (Original, RaspberryMatic, debmatic ...): not relevant
• Version:

Describe the bug
After a while (some days) the values of a group climate device are no longer updated in HA.

Check your environment
In CCU: Compare e.g. Temperature+"Last changed Timestamp" from your virtual device with your wall or radiator thermostat.
They should be (almost) synchronous. This is required to ensure that the problem is not related to the CCU.

Possible Problem
This problem could be caused by zombie-inits. Zombie-Init are not correctly de-initialized sessions that are still stuck in the CCU.
This could be caused by tools using the XMLRPC-API like e.g. Homematic-Manager, NodeRed, MobileApps, IoBroker(?) and Home-Assistant (core and custom integration).

Basically this integration tries to de-init the sessions on reload, restart and shutdown of HA, but this could fail due to a kill of HA.

Check
You can check if your problem is related to zombie-inits with the script of @Baxxy13.
If there are more sessions than expected from non-internal-ips under "Virt.-Devices Schnittstelle" then zombie-inits might be the reason.

Solution
In the case of zombie-inits a restart of the CCU is required.

[SukramJ]

One possible solution is to set callback_port to a fixed port(like 55677).
Hereby the integration reuses the previous init again.