Can't update beacons with Estimote app


I have a few beacons which were set to a high Advertising Interval (2000ms) and low Transmit Power (-30 dBm) some months ago to save battery power since they weren’t used at the time.

Now I’d like to update one of them. The Estimote app can see the beacon, and the app shows that updates are pending, but it won’t transmit the update to the beacon it seems. The beacons is visible, but when tapping the beacon it will disappear from the ‘nearby’ list.

How to update the beacon now?