Fgr222 does not react to commands

I’m trying to get started with z-wave and have a z-wave stick and a fibaro roller shutter 2 (fgr222).
The stick is connected to an openwrt router and forwarded via ser2net. Inclusion worked fine and both things are online. I could also trigger calibration from the things page of the fgr222. But when I try to move the roller shutter nothing happens. The log gets flooded with messages if I set the z-wave logging to debug. This gets repeated several times per second:

2023-08-16 20:24:12.815 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Transaction SendNextMessage 0 out at start. Holdoff false.
2023-08-16 20:24:12.816 [DEBUG] [wave.internal.protocol.SerialMessage] - Assembled message buffer = 01 0A 00 13 03 03 25 01 FF 25 C0 D8 
2023-08-16 20:24:12.817 [DEBUG] [ing.zwave.handler.ZWaveSerialHandler] - NODE 3: Sending REQUEST Message = 01 0A 00 13 03 03 25 01 FF 25 C0 D8 
2023-08-16 20:24:12.818 [DEBUG] [ing.zwave.handler.ZWaveSerialHandler] - Message SENT
2023-08-16 20:24:12.819 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Transaction SendNextMessage started: TID 245: [WAIT_RESPONSE] priority=Set, requiresResponse=true, callback: 192
2023-08-16 20:24:12.823 [DEBUG] [WaveSerialHandler$ZWaveReceiveThread] - Receive Message = 15
2023-08-16 20:24:12.825 [DEBUG] [nal.protocol.ZWaveTransactionManager] - processReceiveMessage input 0<>128 : Message: class=null[0], type=NAK[3], dest=255, callback=0, payload=
2023-08-16 20:24:12.826 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Received msg (0): Message: class=null[0], type=NAK[3], dest=255, callback=0, payload=
2023-08-16 20:24:12.827 [DEBUG] [nal.protocol.ZWaveTransactionManager] - lastTransaction TID 245: [WAIT_RESPONSE] priority=Set, requiresResponse=true, callback: 192
2023-08-16 20:24:12.828 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Holdoff Timer started...
2023-08-16 20:24:12.829 [DEBUG] [nal.protocol.ZWaveTransactionManager] - TID 245: Resetting transaction
2023-08-16 20:24:12.829 [DEBUG] [nal.protocol.ZWaveTransactionManager] - NODE 3: notifyTransactionResponse TID:245 WAIT_RESPONSE
2023-08-16 20:24:12.831 [DEBUG] [nal.protocol.ZWaveTransactionManager] - NODE 3: Adding to device queue
2023-08-16 20:24:12.831 [DEBUG] [nal.protocol.ZWaveTransactionManager] - NODE 3: Added 245 to queue - size 9
2023-08-16 20:24:12.832 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Transaction SendNextMessage 0 out at start. Holdoff true.
2023-08-16 20:24:12.833 [DEBUG] [nal.protocol.ZWaveTransactionManager] - ZWaveReceiveThread queue empty
2023-08-16 20:24:12.834 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Transaction SendNextMessage 0 out at start. Holdoff true.
2023-08-16 20:24:13.079 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Transaction SendNextMessage 0 out at start. Holdoff false.

I’m on openhab 3.4.5 on a raspberrypi 4 (openhabian).