On Wikipedia Android app (latest production version) the Template:Maplink links its map thumbnail to wrong detail page - instead of showing the object in question (line, polygon etc.) it links to page with world map and only displays a dot at the coordinates of the object.
On mobile Wikipedia web viewed in Chrome on Android there is no such issue - the after clicking map thumbnail correct map page opens - full screen map with object highlighted.
Example - open this page on Wikipedia Android app: https://en.wikipedia.org/wiki/User:Kozuch/Bug3 and tap one of the maps.