No, this is not your fault It's because the sensor chip has such inputs, but they are not routed to any sensor or connector on this mainboard model. In such case those pin receive floating values which show up as erratic. The removal will affect this model only as it's not applicable here.
I have an answer guys. I was diging on asrock page and see one note in the end with "*******"
If i think good that's why on my screen I see this...And yes i have custom WT.
When I put cpu underload this vrm2 temp is climbing 1:1 with real CPU temp.
Then i suppose this sensor read waterpump temp.
Do you think I'm correct or i don't understand what this is.
not sure how to log the sensor values in AMD software. And I think these fluctuation have to do with MSI afterburner which I'm using to lower the curve of the GPU fans when not under load. AT least I could not reproduce the high values without it. What do you think?