I just released mapjfx version 1.12.1 it should be found shortly at maven central, the artifact coordinates are:
<dependency> <groupId>com.sothawo</groupId> <artifactId>mapjfx</artifactId> <version>1.12.1</version> </dependency>
The source is available at GitHub.
I implemented some improvemtnes to the code that does the caching of map images.
Comments and contributions welcome.