Hello. I've just heard that this patch has recently become active again.
ThePal made a critical error a long time ago by adding the unfiltered "Who's there?" line to UMP/MPP after Bethesda had fixed the original one. The "Who's there?" epidemic pops up every couple of months at Tamriel Rebuilt and I wrote an analysis here: https://www.tamriel-rebuilt.org/content/whos-there-not-knock-knock-joke-sadly
The line added by UMP/MPP really needs to go (or at least it should be filtered to not ruin games), it adds a bug back that Bethesda removed by limiting the damage its dodgy NPC Detected function causes to one NPC.