Vanilla: After checking over 40+ spawns most if not all are spawning and re spawning correctly.
https://www.wowhead.com/npc=5842/takk-the-leaper spawns but is slightly far north. is meant to spawn on the hill but spawns at the bottom on the north near the sludge fen.
https://www.wowhead.com/quest=881/echeyakee spawns without the quest item and is constantly spawned, unable to use quest item to spawn mob.
Vanilla: After checking over 40+ spawns most if not all are spawning and re spawning correctly. https://www.wowhead.com/npc=5842/takk-the-leaper spawns but is slightly far north. is meant to spawn on the hill but spawns at the bottom on the north near the sludge fen. https://www.wowhead.com/quest=881/echeyakee spawns without the quest item and is constantly spawned, unable to use quest item to spawn mob.
Noticed that the 5.1.0 rare spawns added to vanilla content aren't spawning such as https://www.wowhead.com/npc=51045/arcanus#comments
TBC: No issues
Wotlk: https://www.wowhead.com/npc=38453/arcturis not spawning https://www.wowhead.com/npc=32517/loquenahak spawn time is way off, well over 48h for a 6-10h spawn https://www.wowhead.com/npc=32485/king-krush not spawning https://www.wowhead.com/npc=33776/gondria spawned once at north west location by the stairs then didn't respawn. https://www.wowhead.com/npc=35189/skoll not spawning https://www.wowhead.com/npc=32481/aotona not spawning
Cata: https://www.wowhead.com/npc=54318/ankha spawning but not pathing. https://www.wowhead.com/npc=54319/magria not spawning https://www.wowhead.com/npc=50051/ghostcrawler spawns roughly 36h+ after he should spawn, also doesn't path. https://www.wowhead.com/npc=50058/terrorpene not spawning https://www.wowhead.com/npc=54320/banthalos spawning and pathing correctly but refuses to move once attacked and doesn't attack back until it resets. https://www.wowhead.com/npc=50138/karoma spawned at north spot unsure if respawns.
MOP: https://www.wowhead.com/npc=69943/gumi not spawning instead https://www.wowhead.com/npc=50998/stompy#comments is there but visible and a second stompy spawns just south abough 100 meters. https://www.wowhead.com/npc=69946/hutia was spawned and casting heals as normal unsure if respawns after tame https://www.wowhead.com/npc=69947/degu not spawning. https://www.wowhead.com/npc=50850/savage not invisible, just walking around. Looks like all challenge tames for mop are visible. A list can be found here https://www.wowhead.com/guide=1293/rare-pandaria-hunter-pets#tabs-name-the-jade-forest it has each zones challenge pets and how they should act.