When I start to download multiple maps over WiFi, and then screen goes to sleep, when I open Navigator again it's stuck - no WiFi bandwidth being used, and an almost empty white screen with rotating 'busy' circle in centre and grey 'Connect' box across bottom of screen.
I am unable to then use Navigator, except by force-closing it first.
IIRC It has finished one download but not any others.
I have cleared all App Data and restarted phone - no improvement.
---
Meizu M2 Note (M571H)
Android 5.1
Build number: Flyme 5.1.11.0G