Can anyone help with a project i doing?

I have an arch viz project that I’m working on at the moment that I need to make the materials of some units change with menus. all set up and the blueprints are done. but every time I bake the project all the blueprint actions stop working properly, when I test in play mode the colour change doesn’t work properly as half of the stop showing or don’t work . if anyone could have a look into it and identify why is happening would be amazing as im new to unreal and i cant find anything wrong .