Anyone experience with connecting a Growatt solar-inverter?

So does anyone know if Home Assistant has changed something.

I used to have this sensor i made myself, it worked fine, but now it just says that it is not available.

sensor:
  - platform: template
    sensors:
      delta_t_solar_heating:
        friendly_name: Surplus solar
        unit_of_measurement: KW
        value_template: >-
          {{ ( states('sensor.oocmaXXXXX_all_pv_wattage') | float |
          round(1)) -  ( states('sensor.oocmaXXXXX_load_consumption') | float
          | round(1))}}

(I changed the oocma number, dont know if it is unique)

Both of the sensors are available, but my “surplus solar” sensor is suddenly not available anymore