I synced a RuuviTag (3.28.13) with the Android App (1.4.26). Below is an excerpt. On the second line the temperature reading has been replaced by the air pressure.
2021-03-23T15:41:07+0200,23.23,19.94,1009.4,0,0.0,0.0,0.0,0.0,0,0
2021-03-23T15:46:08+0200,1009.36,20.2,1009.36,0,0.0,0.0,0.0,0.0,0,0
2021-03-23T15:51:09+0200,0.0,20.12,1009.27,0,0.0,0.0,0.0,0.0,0,0
2021-03-23T15:56:10+0200,23.2,20.07,1009.25,0,0.0,0.0,0.0,0.0,0,0
I noticed similar glitches with other RuuviTags I have. I wonder how this was possible. I would use the latest RuuviTag firmware but it does not work well with iOS.