The Wraithspire is a Dreugh Citadel at exterior cell 19 29. Entering via the only door into the interior ("Wraithspire, Phantasmal Atrium") teleports the player to a spot halfway down the structure, rather than teleporting them to the other side of the door.
Can't get the fishingpole quest from Grum gro-Shalug in Gol Mok. He says the greeting that I assume starts the quest but it gives me no topic, no journal entry. And in fact if I use the quest id from the wiki I can't even use console command 'journal TR_m4_wil_fishingpole 10' to get the quest. The fishingpole is under the dock where it is suposed to be.
That's a dust beetle, level 6 and far from easy at the very beginning of the game when the player is most likely to be sleeping out in the Aanthirin. Maybe replace it by a (regular) rat?
Inside the "Ilvi Ancestral Tomb" cell (Depths and Urn Chamber not affected), sounds other than background music and tomb whispers do not play. My openmw.log shows:
[18:55:45.408 I] Loading cell Ilvi Ancestral Tomb
[18:55:46.104 V] Fallback locale: en
[18:55:46.104 V] Language file "l10n/Navigation/en.yaml" is enabled
[18:55:47.943 I] Playing music/explore/mx_explore_2.mp3
[18:55:47.982 E] AL error Unknown Internal Error (-1) @ playSound3D:1182
[18:55:47.990 E] AL error Unknown Internal Error (-1) @ playSound3D:1182
Almost every Dark Elf female name in Arena and Daggerfall ends with -ah, as one of the internal setting rules, but no Dunmer female names in Morrowind end in -ah except for Barenziah, who was imported from Daggerfall. Thus, ending a Dunmer female NPC's name with -ah confirms it was based on Arena procgen rules, not Morrowind's names.
So while in the Koranyon, Upper level, if you go through the Sturdy Wooden Door which leads to Mount Sarrunabi, if you equip a custom spell, it simply crashes. With normal spells it did not crash, only some custom spells. Simply equipping the spell or trying to cast the spell, it freezes and crashes.
The elevator in Monastery of St. Felms constantly kills my character when I try to use it for ascending up the shaft. It all of the sudden reduces your HP to 0, regardless of the starting hp number. I never seen it happen while descending by the elevator, but going up seems to be impossible without dying.