So am I literally the only person experiencing this problem, and even the Dev team doesn't know?

So I was talking to a friend the other day about why I'm not using Opera GX, and he was completely confused by my explanation. Namely that if I click on a link in Discord, Telegram, or whatnot, it takes about 5 seconds for Opera GX to actually react to it, namely coming to the foreground and opening a new tab to the site.
This doesn't happen with Chrome nor Firefox. I like Opera GX, but this delay on links really messes with me, often resulting in 2 or 3 tabs being opened from thinking I missed the click entirely.

Anybody know what might be causing it, and thus how to fix it?

This was mentioned back in 2021 in this thread: https://forums.opera.com/topic/50447/i-can-t-install-youtube-or-youtube-music-with-operagx?_=1694900913617&lang=en-US

But I'm in the same boat. The "installer" just creates a new window without any top bar or anything. It's nice to have on a separate monitor so you can see what's playing at a glance, see the lyrics, what's played recently or coming up....
I know YouTube Music is supported by the side bar, but I'd much rather have it popped out like this. And since I listen to music whenever I'm not playing games or watching videos, it's the only thing keeping me from adopting Opera GX as my browser.
Any ideas on how to do this with Opera GX?

Rather than having "Force Dark Mode" as a broad sweep, or a somewhat hidden "Enable on this site"/"Disable on this site" list, it could be made a touch easier with a (an optional) button in the top right, or maybe the side bar. Make it pop up the dialogue box to enter the site address with any wildcards, perhaps with an "Enable on this site" radio button, and "Disable on this site" radio button, so only one dialogue box is needed, regardless of if "Force Dark Mode" is turned on or not.