I am having some problems with the 2 imperial warships interiors we plan on using in TR. Intermittently, sections of the walls or floor will disappear momentarily (maybe for 1 or 2 frames). Then eventually MW will crash. I am running tests on a vanilla version of MW, with MCP (2.0). I am not running MGE. Does anyone know what might be going on here?

Below are links to the 2 files.

https://www.dropbox.com/s/1bd6zrwvn05espm/tr_in_imp_warship_l.nif?dl=0

https://www.dropbox.com/s/b9uifd473vlqql9/tr_in_imp_warship_u.nif?dl=0