Not quite sure what room you talk about. Can you get a screen of the room, adding red lines which explain the room in question?
It's not in override, it's in 003EBO.mod. However if one was in override, it would override mine, and things would go bad. Same for k_003ebo_enter.ncs.
I am pretty sure it is a file in your override that does this, considering the scene runs just fine for me.
And no, the game doesn't return to the EH at that point in vanilla. It only does so in TSLRCM, and runs the proper scene using our modified k_003ebo_enter.ncs. And yes, that means someone gets stuck if using an incompatible one from another mod, like the user below...
Delete k_003ebo_enter.ncs from your override
Delete k_003ebo_enter.ncs from your override
(So yeah, both are caused by using incompatible mods)