Have noticed that the temp sensor in the Umbrel dashboard seems buggy since update to 0.5.2. After update to 0.5.3 behavior is still the same.
The temp monitor often seems strangely high, but I do not think that the displayed temps are correct.
If I click on the temp °C/°F toggle once or twice, it suddenly changes back to ‘normal’ somewhere in the range of 48-50°C.