There is a shadow recall for HVAC temperature sensors, which might be related to your issue (probably not, but for what it's worth...) I took my 2020 MY in for a separate recall (check seal of control arm ball joints), and while it was in they also warranty-replaced a couple temperature sensors based on the VIN. I had previously noticed that the HVAC was inconsistent in controlling cabin temperature. Now it works as well as I could want.
They replaced:
PT Sensor, Low Pressure, 1 each
PT Sensor, High Pressure, 2 each
The cabin temperature sensor was not replaced, according to the invoice. So your issue may be unrelated, or maybe you have this and a bad cabin sensor! I agree with Carlos31820 above that with values fluctuating that much it's likely a bad connection somewhere.