Cisco SG300 series temperature invalid

Since update from 19.10.10074 to -> 19.10.10081 all our Cisco 300 series devices have found a temperature sensor. Unfortunately, on all devices it is showing just 2 degrees (and in alarm, as the maximum threshold is breached).

So presumably it's not a real sensor, i'm uncertain if they had any temperature sensors prior to this, and no history is shown.

Models detecting so far are the SG300-10 and the SF302-08

Notification is:
Device Sensor added: temperature CISCOSB-Physicaldescription-MIB-rlPhdUnitEnvParamTempSensorValue 1 Device

Attached discovery (sensors) debug output for reference, from an SG300-10.