continous scans for beacons in the foreground not working

[raghavk92]

when i turn on the app if within a few seconds (maybe 10sec) it tries to find beacons but after that even if i turn off the beacon or turn on new beacons there is no response from the app . Unless i exit to main screen(home screen) and turn on the activity again is when the changes to beacons are detected. Is there some issue with the code or is it hardware. I have followed the code lab to the end. I use nexus 7 2013(android 6) for the app. And beacon simulator on moto g4 (android 7)