Q: Which device make and model are you using?
Huawei: OS 5.1
Samsung S6: OS 6.0.1
Which basemap are you using?
OpenStreetMap, Arcgis tiled layer
Can you reproduce with just a mapview and a map? (meaning simplest reproducible case)
Nope. Only with a navigation menu.
My findings:
I have found the root cause in my solution.
I have managed to pinpoint the cause to the use of Xamarin support libraries, version 23.1.1.0. I am building to support up to API 23 only. When using support libraries version 23.4.0.1 (latest libraries for API 23), the map is not flickering.
My app:
Using ver 23.1.1.0, when building a simplest possible solution with only mapview, there is no flicker. It is only when I integrate the map with a navigation menu/drawer that the flicker is happening.