5.15.3: Screen sharing on Google Meet still doesn't seem to work

WIth QtWebEngine 5.15.3, according to QTBUG-85731, screen sharing should work.

However, that doesn't seem to be the case. When starting a new meeting, then selecting "Present now" and "Entire screen", the screen doesn't get shared, and the devtools display:

"Uncaught (in promise) Error: DisconnectedError, EndCause = 0"

Screen sharing in Chromium with the same setup seems to work fine.