ASRock Motherboard CPU Sensor - Hardware defect, or bug?

hi

recently i build myself a new system.
amd 2600x
asrock x470 fatality gaming k4

i think i have a faulty CPU sensor on the motherboard.
The CPU sensor in the motherboard tab only showed when very hot. then i found out i can enable sub zero temp readings in HWInfo. with that enabled the sensor shows up every time i start HWInfo. 
but the reading is -62c. when it gets hot it seems to climb to 60-65c. when it cools it jumps from 39c to -62c every time. it can not show idle temp and takes quite a while to rise.
As a result when the motherboard fan controller is on default, its set to monitor "CPU Temp" and therefore is not working correctly. luckily it has a setting monitor Tctrl on the cpu itself.

also i can set the debug numbers to show temperature. they are stuck on "33" (when hwinfo reports -62c) but as soon as temps in hwinfo are in the positive it seems to show the same.

i have a complete log, and enabled hwinfo debug earlier today. can i upload this here?

i also contacted asrock support and forum

thank you

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