Are you sure your browser isn't unloading tabs to save memory? I think Chrome enabled automatic unloading a while ago, and it's been standard on mobile browsers for ages.
Ironically, one of the reason Google's offerings are (were?) worse is because Google prioritized privacy and required pings from multiple phones to count a tracker as seen.
Netflix has a stream with close-up cameras, as they were the ones who arranged the whole thing. Unfortunately the commentary and color grading are both terrible: https://www.netflix.com/watch/81987107
I’m not even convinced the audiod thing is Regin; whatever is going on is way less sophisticated even based on what the OP posted from volatility. I don’t think the hash they gave vx-underground is even from the sample from the original screenshots.
I think this person is just karma/clout farming badly and the screenshots are of some even more basic RAT.
He hasn't actually confirmed that the image he's processing is recent or if it was a test image and by "I found", he means he was able to find the thing that was known to be there. The Twitter thread has some people asking for clarification and none have been received yet.
reply