MPPT does not automatically switch to Slave / Ext. Control & BMS

Hello,
I switched from a Cerbo GX to a Raspi. I installed a WaveShare 2-channel isolated Can Hat. The system then gave me the error #67 BMS lost. Can interface works. MPPT-Can network -status RX / TX the packages are coming in - no errors. Display of the values ​​under Device list is ok - values ​​are being transferred.

Then I pressed Reset in the Device list for the MPPT-Can to let the device run stand alone. Wanted to make sure that the communication was working. Everything was ok. Then I set Battery, BMS controlled back to yes on the MPPT in the settings.

Network status is now Group Master and BMS controlled is yes.

The MPPT should recognize the BMS and automatically switch to ‘Ext. Control & BMS’ in the Device List of the MPPT under Networked Operation in Mode setting.

Interface is running. Packages are being transferred and the MPPT values ​​are also coming to the Remote Console?

Why is it not being changed to ‚Ext. Control & BMS‘.

Fred