I have a similar problem with an D3.3 beacon. It’s running A2.1, but the Estimote app reports that “This beacon is up to date”.
I’ve seen other threads on this forum where people have experienced issues like this, and someone from Estimote has helped them out… @heypiotr, can you help us out here?
Alternately, you can send an email contact@estimote.com with the issue.