"Glow" effect done with a radial fill doesn't render

[chrisadams-n]

No description provided.

[Jhonnyg]

Somewhat fixed by 8142933

The missing glow is somehow related to the blit we do from the rive flush into the backbuffer, you can disable this by using:
rive.debug_set_blit_mode(false)

This will cause anything rendered before the rive content to be cleared, so you need to make sure to render rive content first (via render scripts).