First one is quite old, in Straits of Devastation, I did report it before, I even got a guildie to check if it really was a bug, and that guildie too could jump through the hole in the roof. After that did some jumping around the hole, the existing roof acted as a floor, tho invisible one…
Second is quite recent, in Sparkfly Fen, I guess it’s supposed to be some filter or something trigger that would change the lighting inside the cave, but that didn’t work and the cave was as lid as outside areas.
I’m a casual PvE adventurer, I enjoy combat, adventure and helping, but not farming.
I rarely do PvP or Hard PvE, unless it’s organized.