onExit() Never call in Android 7.1.1 ( Nexus 6 )

I am using Estimote SDK 1.4.0 in one of my app.
I have developed one app for Monitoring, it’s call only onEnter() but never call onExit() in Android 7.1.1 ( Nexus 6 ).
It’s working fine in Android 5.1.1 and Android 6.1.2 or 6.0.1

May be this article from Estimote Android SDK on github can help you.
Android 7 and BLE restrictions

Please try Estimote Proximity SDK where this problem has been addressed.