We found the (last) issue keeping everything from working properly when you are creating a new GameCycle subclass and attaching to an existing GL context. See Ticket #8 for details.
The easiest way to trigger this defect is to subclass the GameplayFragment and every game start after the initial one, renders a "blank" scene. Everything is actually working properly, except for the bookkeeping error (see Ticket #8) causes the rendering matrices to compute incorrectly.
With that said, we are preparing another release. We encourage you to use R49 in the meantime; there are many new features and some breaking changes to resolve if you have any code.