Hi there,
I am not sure what the problem is but if you could please answer these questions I might be able to help you.
1) Do you still see the issue if you used the default basemap on Nexus 5?
2) Is the Location enabled on the device?
3) Can you provide a video or atleast a screenshot?
4) If you can share your app or provide steps to reproduce it I can try on my end. I have Nexus 5 available but I can't reproduce the problem.
Thanks
Nakul