Homeatic Devices werden unreachable nach circa einem Monat

Hi,
ich betreibe Homegear schon seit Jahren und bin immer sehr begeistert. Betrieben wird es auf einem Raspi mit SCC Modul. Nach einem letzten Upgrade des OSes von Stretch auf Buster und auch von Homegear auf die Version 0.7.51-3497 lief erstmal alles so wie immer.

Nun ist es so, dass immer nach circa einem Monat Betrieb immer so circa 16 Homematic Devices unreachable gehen. Ich vermutete irgendwie sowas wie SD Karte defekt oder keinen Speicher mehr. Also habe ich die SD Karte getauscht, sämtliche Konfigurationen geprüft und den Speicher überprüft. Speicher und Karte waren auch in Ordnung. Die CPU langeweilt sich. Wieder einen Monat gewartet. Wieder der Fehler. Ein einfaches homegear restart und schon läuft es wieder einen Monat. Auch im Debug kann ich persönlich nichts erkennen. Hat vielleicht jemand so ein ähnliches Verhalten schonmal gehabt? Im Log steht sowas.

11/15/22 19:10:47.119 Info: Peer 48 is set to unreachable, because no packet was received within 10000 seconds. The Last packet was received at 11/15/22 16:24:05.000
11/15/22 19:54:19.322 Info: Peer 27 is set to unreachable, because no packet was received within 600 seconds. The Last packet was received at 11/15/22 19:44:17.000
11/15/22 19:55:20.498 Info: Peer 26 is set to unreachable, because no packet was received within 600 seconds. The Last packet was received at 11/15/22 19:45:19.000
11/15/22 19:55:25.623 Info: Peer 14 is set to unreachable, because no packet was received within 600 seconds. The Last packet was received at 11/15/22 19:45:24.000
11/15/22 19:55:40.779 Info: Peer 23 is set to unreachable, because no packet was received within 600 seconds. The Last packet was received at 11/15/22 19:45:37.000
11/15/22 19:55:45.478 Info: Peer 3 is set to unreachable, because no packet was received within 600 seconds. The Last packet was received at 11/15/22 19:45:42.000
11/15/22 19:55:51.956 Info: Peer 15 is set to unreachable, because no packet was received within 600 seconds. The Last packet was received at 11/15/22 19:45:49.000
11/15/22 19:55:52.030 Info: Peer 16 is set to unreachable, because no packet was received within 600 seconds. The Last packet was received at 11/15/22 19:45:51.000
11/15/22 19:55:52.390 Info: Peer 22 is set to unreachable, because no packet was received within 600 seconds. The Last packet was received at 11/15/22 19:45:49.000
11/15/22 20:01:04.265 Info: Peer 19 is set to unreachable, because no packet was received within 1200 seconds. The Last packet was received at 11/15/22 19:41:01.000
11/15/22 20:03:00.624 Module HomeMatic BidCoS: Info: Setting peer to unreachable, because the queue processing was interrupted.