Version 3.6.3.28529 on Android

I use Nexus 7 Mk1 for SD 
On a recent flight I found the Nexus would not receive Satellite signals . I have three Nexi (!) and investigating I have found two of them do not get the signals. One works fine, as does my Asus android phone
The two faulty ones do work with PilotAware OK, suggesting that when "go flying" somehow these early Nexi have a problem with the latest release.

Pat Thody

My nexus 7 2012(4.4.4) was working...then started not seeing satellites.
I noted that the location services icon was always displaying(but not giving location to apps), unless location services were turned off, whereas it used to just pop up when required by SD, google maps etc.

Update: Did a reset,allowed all updates , then installed latest beta....seems ok
Edit: I spoke too soon, it's back, uninstalled SD,reboot and it's gone.
I'll give 3.6.2 a go.
Any ideas?

Pete