Near Bodrum, in Roth Roryn -14, -18 area, on top of the river near the wooden bridge there is a huge blue arrow visible in-game. It's not visible when you play OpenMW game version, but it's showing up if you play Morrowind on Steam (I've changed versions during the same playthrough).
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.
For some reason TR interior tent doors sometimes do not match the rest of the tent, and the gap to the void of the interior is visible in game. I don't know if it's something prepared for yet not implemented feature, like for example showing some ground from the exterior while being inside of the tent, but I've noticed that several times. Happens in: Velk Camp interior Urvel and Hanneth's Tent Ulyn Menathren's Tent
Orethan 05 currently edits the road going out of Dreynim to be the grey Ind cobblestones, but I would like this edit to be merged into TR_Mainland.esm so I can remove those cell edits from that exterior claim, and because they fix some jankiness with the spa's landscape.