Qt3DWindow inside of a QDockWidget is buggy

[thesamprice]

I tried putting a Qt3DWindow inside of a QDockWidget but ended up with buggy results. When the window is docked I can't expand / contract the window. Also when docked the 3d view seems sluggish.

https://github.com/thesamprice/qt3dDockTest

Im running on a mac, 10.14.6, and qt 5.15.0

Not sure if i'm doing something wrong, or should just switch to opengl for 3d views.

Is there an example out there that I could download? Some example with the Qt3Dwindow running inside of a dock widget?

Wanted to play around with making a 2d / 3d cad like system.
Might switch to opengl view though.

Thanks in advance.