I was told to put this down into the suggestions panel of the forum by a Game Master in .ann chat when I made mention of this a couple days ago.
These gobs have incomplete or missing textures. I would hope that these can be fixed sometime soon!
Check list below for walls with incomplete or missing textures:
[royal_bloodelf_wallsmallalt01.wmo - 848501] (GUID: 21171)
[royal_bloodelf_wallsmallaltconvex.wmo - 848502] (GUID: 21185)
[royal_bloodelf_wallsmallalt.wmo - 848500] (GUID: 21190)
[royal_highelf_walllargealtcurved - 879642] (GUID: 21191)
[royal_bloodelf_walllargecurved.wmo - 848498] (GUID: 21194)
[royal_bloodelf_walllargealt.wmo - 848496] (GUID: 21195)
[royal_bloodelf_stairwall.wmo - 848487] (GUID: 21199)