I have had some sync issues with one RuuviTag since I upgraded its firmware from 3.28.13 to 3.29.3: it does not sync anymore with the iOS App. Android sync works. The Ruuvi App on both phones receive the regular measurement updates. The upgraded RuuviTag does not have the “maintain connection” activated.
I have not tried upgrading my other RuuviTags yet. They work, with 3.28.13, work as before.
Any idea why the syncing does not work?