Hello, I was just in a greater rift and died. At the same moment I died, I also gained a paragon level. With my tombstone present, my health jumped back up to full (from the level up). My health dropped again as if I was being hit by enemies, but they were stationary as if I was still dead (which I was). During both “deaths” there was no option to revive at all. After waiting for about 2 minutes I decided to Alt + F4 and restart the game. Hopefully this helps out. Sorry if this has already been reported before.