Hi all, 

Hopefully a quick one. I've attached here an overlay two parts in question. Typically, I like to use the measure tool to click between parallel surfaces to check stock. I recently installed new settings and now I'm having an issue where when using the measuring tool, I'm unable to select the internal blue surface after selecting a surface on the green part (snapshot attached). In the past, the first selection's body turns entirely transparent and I'm able to select features internal to it within the assembly; that is not the case as of now. 

Has anyone experienced this before and know of which setting(s) need to be updated?

Thanks in advance!