Cannot revive in Regular rift

Running DH in a T16 regular rift with the new set, and was killed in ELEMENTAL TRAIL 2. There is no revive dialog. I’m just dead. (and no, this is not in HC). Doesn’t seem to be a ND. It notifies my I am AFK while I type this in another window and I can mouse over my killers and see there affixes, etc. but no way to resume the rift…
If it helps, two observations:
On screen are Uphir the Discordant, 2 Succubus, 5 Ghastly Seraph, 2 Exorcist.
While mouseover works, nothing on the screen (Paragon “+”, chat, friends, collections, etc. ) is clickable.
That’s it - first time it’s happened to me so probably a tough one to find, but definitely bugged out!
I was able to press ESC and Leave Game (after 10 sec countdown).

This has been happening since release, on console and PC.
It can happen in group play too, which used to result in you not being able to collect loot (but you can now exit and rejoin and enter the GR).
They either aren’t sure why this is happening, can’t reproduce it, can’t fix it, or aren’t even aware it’s an issue.

I see this at least 1 or 2 times every season, and at least 1 other person I’m playing with has it happen too.