I encountered a possible bug while using the chime feature of the Rainforest Connection "Companion" app to set the time on an AudioMoth today.
I had just configured the AudioMoth a couple hours before, but it was jostled and lost its set time. I used the app to set the time. After that, I changed the AudioMoth to USB/OFF mode and plugged it into my laptop to check that the time was set correctly. The config app showed that the time was late by 2 hours (displaying 17:44 UTC instead of 19:44 UTC). I am in Eastern timezone, UTC-4:00. I tested the AudioMoth by removing the batteries and attempting to use the app again, and this behavior happened again once or twice, then stopped happening.
Subsequently I have reproduced this problem and gotten a variety of incorrect times, including roughly 2 min, 20 min, 35 min, 40 min, more than an hour, etc.
Has anyone encountered this or could think of a reason it could be happening? One possible source could be some very high frequency sound in our lab space aliasing down into the audible frequencies and messing with the app chime.