dark background presentations uploaded disrupted by white clearing flash

[Reimar Bauer]

Hi there,
I rephrased my other posting


We have used a dark background color and have recognized that we now
have after uploading and using it always between two slides a white
colored clearing flash.
Something like a white page is shown after each slide just before the
next slide shows up.

Example on https://github.com/bigbluebutton/bigbluebutton/issues/9231

Is there yet a simple way to change this color?

Reimar