Since I was still experiencing issues, last week I re-flashed the firmware on my mooshimeter (just normal OTA via the app). Had to use the slow/old method BTW to let it succeed. Though the version is still the same (there was no update, just reflashed out of curiosity), I have not yet to encountered a failedstatus -1; the meter seems to be working fine and reliable again. Problem is a few days after the firmware flash I also received an OTA Android (security patch) update, so I’m not sure whether reflashing is a reliable method. Maybe one of you guys can test it as well?!