DesktopMoviePlayer appears blank in built app

Hi,

In one of my apps, a DesktopMoviePlayer appears blank (just a black rectangle), but only in the built app.
Here’s the debug version:
image
And the build version:
image

The player responds to code and I can even click blindly (which works), but stays visually black.

I can’t reproduce it in a simple project and haven’t found a bug report about it, so I have not much hope to get it fixed, but I thought perhaps someone has an idea :man_shrugging: