Since 2021.3 where the MySensors integration is setup from the UI the correct unit system does not appear to be sent to nodes on registration.
I have “Imperial” setup as the unit system in home assistant but the data I’m receiving from my temperature sensor nodes is in metric.
Looking at the serial output on the gateway I think this is the response setting units:
206580 TSF:MSG:SEND,0-0-5-5,s=255,c=3,t=6,pt=0,l=1,sg=0,ft=0,st=OK:M
Has anyone else seen this issue or should I open a bug report?