Unable to update my beacons firmware 2.2.0

Hi, I’m playing with a Dev kit.
I’m trying to update firmwares through the official Android app to use flip to sleep functionality (it says it’s unavailable), but it says it’s up to date at 2.2.0
I saw there were similar problems, can you help me?

Thank you

Send us your Estimote Account email and/or the identifiers of the beacons to contact@estimote.com, and we’ll look into it!