We created a mobile app with Xamarin Forms and use a local vtpk. On android the map seems to flicker when panning around, qui shortly.
App : MapCERN - Android Apps on Google Play
Vtpk : https://maps.cern.ch/MapCERN_app/VectorTilePackage.zip
I logged a defect for this in regards to the Android runtime.
BUG-000101144: Rotating a vector tile map causes the screen to flash..