After opening another instance of activity previously launched activity makes some re-initialization stuff after which renderScene() call seems to be ignoring rotation made to objects.
Camera rotates as usual, but transformations are not applied to objects, they keep their old transformations applied.
In short, it behaves like renderScene() doesn't do any work.
Calling world.buildAllObjects() before renderScene() doesn't work as well.
Please explain what needed stuff can be lost after re-initialization or may be if it's a bug in JPCT-AE, fix it.