Changing to and from an interior cell doesn't update collision

"placeatpc" an object, go to an interior or exterior (if you were in an interior), return to the cell where you placed the object. Morrowind updates the object's collision while OpenMW doesn't (unless you save and reload, or disable/enable but that's not exactly related).

Use "tcb" when testing in OpenMW but remember that "tcb" in Morrowind.exe lies and is broken (like some other debug views).