Thanks for the bug report. I can confirm something odd is going on. I think this is an issue where a few subtle things are going on.
1) Timing is not clear when using the automatic drawing inherited from OB3D, we suggest using @automatic 0 – but thats not all
2) it looks like resizing a window is actually doing some weird GL stuff, and we may have an “init” issue because of that.
Stay tuned, and thanks again.