Is Blizzard Screwing with us?

I just finished a run collecting organs to open

Uber Tristram.

Forgotten Sands and

Furnace of Pain went as usual but when I got to the

Matron's Den I entered the Twilight Zone.

Lilith is always hiding in a sort of cul de sac, a closed off room at the Edge of the map.

Lilith usually isn't all that hard to find because when you approach her location she generally announces herself by throwing up a fuss with a circle of poison spray, but this time there was nothing. So I opened my map and according to the map image every room was accounted for, I hadn't missed a single area. I always make certain I visit every closed rooms, and yet still no

Lilith, so I took a screenshot. Then I ran the entire map again checking each closed room. When I finally found her, according to my map it was in a previously visited closed room, and she was surrounded by her minions. I've done a numerous Ubers over the last 2 plus years and I can't see how according to the finished map image, that I came so close to

Lilith without initiating an attack, and yet that's what seems to have happened. Has anyone else ever experienced this??