AC200l AC output watt display sensitivity

Just started using my new AC200l and I have a question regarding the display of AC output watt.
It seems that if the output/load is below 40-45w (might be higher) then the display shows 0w. If the watt load gets higher, like 120w) then the display will show load in watt.
Also when using the app the AC output copies that of the display


Is this normal behaviour ?

Yes, it’s normal for those machines.

Roger that, thanks for answering