SmartShunt 500/50 loses connection after configuration of AUX port

[klehnst]

The connection to the SmartShunt works perfectly, when I have configured the battery the connection is still available. Then I set the aux port to starter battery and it immediately loses the connection and no more entities are updated. The only thing that helps is a factory reset. Then the integration re-establishes the connection. If I set the Aux Port to None, the shunt keeps its connection and delivers its data.