Hi @XTrabbi, did you observe whether the items/channels are updated after you restarted the system? I sounds like the long polling mechanism fails after some time.
This is probably related to this bug: [boschshc] Long Polling crashes regularly every one or two days · Issue #15912 · openhab/openhab-addons · GitHub
To verify, you could check your log files for long poll failures or the error message Scheduled runnable ended with an exception.
This issue should be fixed with 4.2.0.M1 or newer (4.2.0.M2 is the latest milestone release with the fix). If possible, you could update to such a milestone version and check whether it works then.
Let me know if you need any further assistance or have any more questions.