This is an issue with the ChromiumFMX implementation, we will investigate here what exactly is going wrong. In XE8, which doesn't use the ChromiumFMX, there isn't an issue with local files. On iOS / Android, loading a file from a local path should have any issues.
Another related Issue I detected on XE8 is that when you have the map on one tab and something else on another, and switch between both, the marker disappear.
They're fine and visible if the map is visible on the screen when you create them. switching to the 2nd tab and back makes them disappear.
I appreciate your suggestion, but we need to be able to view the source code of a sample project that demonstrates the issue in order to find out the cause of the problem.
Also is there possible to use standard markers with different colors?, default marker is red, is there a way to use the same marker in: blue, yellow, green, and so on just with a parameter?
I'm not talking about use a custom image, but the default google marker.
Unfortunately it's currently not supported to display the default marker icon in a different color. We'll have to investigate if this is supported in the Google Maps API.