Web Compatibility Support • Re: Youtube unresponsiveness and interrupted playback

I tried turning PureURL off, changing eMatrix/uBO allows (including my filters), changing VPN server, and even going back to a previous PM version, and nothing worked. In desperation, I tried a Private window, and so while logged out, comments and such work, even with the usual normal eMatrix/uBO & PureURL stuff enabled. So this only happens while logged in!?