Hello!
We improved our scanning mechanism for 5.0+ Android devices in ProximitySDK alpha release. You can check it out here. It provides the same (but more reliable) experience as using iBeacon regions, but it’s based on top of our own protocol (EstimoteLocation). If your beacons support EstimoteLocation advertising, then I strongly recommend considering moving to this solution, because we are constantly working on it at the moment.
We are moving our Android stack to a new architecture, and you can track the changes in this topic →
Any feedback much appreciated!