[avmfritz] DECT devices remain UNKNOWN after changing bridge

[ansorg]

I had a 7490 with two DECT switches. The 7490 was on 192.168.178.109. The FB was set as BRIDGE device in Openhab, with the two DECT using this bridge.

Now I got a new FritzBox Fiber, that is now my new gateway at 192.168.178.1
I reconnected the DECT devices to the new FB. They show correctly in fritzOS UI

In OpenHab, first I tried to change the existing bridge by pointing to the new IP, with credentials. But the bridge could not connect.
OH had already added a new Thing to the inbox for the new FB so I configured that as the new bridge. It shows as ONLINE.

Now I changed the two DECT things to use the new bridge. Unfortunately, their status remains at UNKNOWN in the UI

Now I enabled the debug log for the binding via log:set DEBUG org.openhab.binding.avmfritz

In the log I see entries like

08:07:55.474 [DEBUG] [nal.handler.AVMFritzBaseBridgeHandler] - Poll FRITZ!Box for updates avmfritz:fritzbox:Fritzbox-F-192_168_178_1
08:07:55.539 [DEBUG] [rnal.hardware.FritzAhaContentExchange] - HTTPS response: 200
08:07:55.539 [DEBUG] [rnal.hardware.FritzAhaContentExchange] - HTTPS response: 200
08:07:55.540 [DEBUG] [rnal.hardware.FritzAhaContentExchange] - GET response complete: <devicelist version="1" fwversion="8.00"><device identifier="08761 0492200" id="16" functionbitmask="35712" fwversion="04.26" manufacturer="AVM" productname="FRITZ!DECT 200"><present>1</present><txbusy>0</txbusy><name>FRITZ!DECT 200</name><switch><state>1</state><mode>auto</mode><lock>0</lock><devicelock>0</devicelock></switch><simpleonoff><state>1</state></simpleonoff><powermeter><voltage>230241</voltage><power>31250</power><energy>190246</energy></powermeter><temperature><celsius>205</celsius><offset>-20</offset></temperature></device><device identifier="11657 0591908" id="17" functionbitmask="35712" fwversion="04.25" manufacturer="AVM" productname="FRITZ!DECT 210"><present>1</present><txbusy>0</txbusy><name>FRITZ!DECT 210 Außen</name><switch><state>1</state><mode>auto</mode><lock>0</lock><devicelock>1</devicelock></switch><simpleonoff><state>1</state></simpleonoff><powermeter><voltage>230863</voltage><power>5090</power><energy>1146780</energy></powermeter><temperature><celsius>120</celsius><offset>0</offset></temperature></device></devicelist>

The XML seems to indicate that the two DECT are reachable?

How to get them to work properly and show as ONLINE again?

Openhab 4.1.2 with fritzavm
FRITZ!OS: 8.00