The problem is likely not about the morph. DisplayIDs don't change much over the course of xpacs. The likely issue is a simple core issue. MoP isn't the stablest of Private Server Cores.
"Both sides are going to shit on each other for a year, then some other giant apocalyptic force will stop by, and we'll find common ground in kicking the shit out of that." -Mirran
"Heroes die. I'm just a woman with a gun." -Sil
" ...... So dating involves killing two creatures, ripping open their chests and... connecting hearts? [Low] Mortals are weird." -Xanea
"I always have an emergency potato in my pants." -All sensible Dutch folks
"Heroes die. I'm just a woman with a gun." -Sil
" ...... So dating involves killing two creatures, ripping open their chests and... connecting hearts? [Low] Mortals are weird." -Xanea
"I always have an emergency potato in my pants." -All sensible Dutch folks
Spoiler: