WxPython on macOS 10.15 Catalina

I’ve been trying to test my wxPython application on macOS 10.15 Catalina, but I find it freezes around 10 seconds after starting, every time. There are also commandline complaints about being unable to prepare an accelerated openGL context, and falling back to software rendering.

Has anyone else tried this/does anyone else have an idea of what might cause this?

Hamish