Suppressed parts when opening assembly from Windchill

Hello,

I am experiencing an issue when I try to open Solidworks assemblies from Windchill where all the part files in the assembly are not being brought into the workspace. This causes parts to become suppressed. When I un-suppress the suppressed parts, Windchill is able to find the part files and bring them into the workspace without issue. 

Does anyone know why this is happening? It seems that sub assemblies inside a larger assembly experience the issue more often. Also, it seems random which files become suppressed with different users experiencing issues with different assemblies. Any advice or guidance is appreciated!