The problem occurs also, when I share a tab without audio
Video/Webcam was not activated when I created this dump.
What is really weird is, that the problem occurs only when sharing a tab AND with specific content. The problem can be reliably reproduced with the pdf file from my first post. With other pdf files sharing a tab works without problems.
Any ideas what I could try to analyze / debug this issue? Are there any configuration parameters regarding screen / tab sharing which I could try to change?