Sensor.Power_Consumptio_LX n is a listet Entity with a point as a decimalseperator (in HOAS as well as in the MQTT-Broker.
In the past i was happy with but since one of the last updates of HOAS it is not working anymore.
The current output of the mentioned state is like 19824512}
The first one would never have worked. You were adding strings not numbers. You need to convert the states (which are strings) to numbers before you can add them. You should also use an availability template to prevent odd readings if one or more sensors are unavailable. Particularly if you ever convert this sensor to energy for use with the energy dashboard. See: Why an availability template is important for energy template sensors