Suppress unreal values from inactive sensors

[apartmedia]

Is there a way to suppress or catch fancy sensor values when the device is (temporarily) not available or inactive?
One of my Shelly H&T Sensors died after a unsuccessful FW update.
Since than HOOBS is showing 100 degrees for this sensor resulting in HomeKit telling me a crazy temperature range in my home.
I understand that normally an inactive sensor should be removed from HomeKit. But the sensor is just temporarily unavailable. May be there is a way that HOOBS can determine this situation with a more realistic temp value than 100 degrees (or at best with an info like a dash -0 or N/A or something, don‘t know if HomeKit can handle these type of values).