Matching powermeter to trainer resistance

Hi Armando,
Using the app and smart trainer, I always need to ride 20w higher to maintain the set interval power. I can adjust the Power slider down, but it resets back at each new interval which is a major PIA , and also adjusts the changes power ( would be good if that stayed fixed so you know what you should be doing ).
Is there a way to set it up permanently? I tried the Offset and Power scaling, but they seem to always reset themselves, not sure how this works.

Do you have powermatch enabled?

Yes.

It will automatically calibrate scaling and offset for your power meter and trainer. If you don’t want it to powermatch, you can turn it off under the Trainer sensor settings.