Teleportation in some mods spawns the playing character underneath and not above the supposed objects
On Ultimate Galleon, sometimes when you use the ship's fast travel or get out of the interior of the ship, you spawn in water underneath the ship and not correctly on its deck (this ofc doesn't happen in Morrowind.exe, where you always spawn correctly on the ship). It happens basically every time you get out of the interior of the ship and it happens pretty often when you use the Fast Travel options from the ship command. Also, sometimes after the fast travel, you can spawn stuck in front of the rudder.
Video demonstration and log: openmw.log 2023-07-27_17-01-22.mkv
Ultimate Galleon download page: https://www.nexusmods.com/morrowind/mods/53484
Likely the same problem happens also with this other mod: The Battlespire. The first time Tadas teleports you with the Solar Ship from Tel Fyr to the Battlespire, most of the times you spawn underneath the ship (on Sadrith Mora), in other attempts you may spawn correctly on the ship (but rarely). In most of my attempts, in fact, you spawn underneath the ship and you fall on Sadrith Mora (which is incorrect behaviour, of course).