Inserting PDF as Block Reference crash/lag

Trying to insert a pdf as a block reference takes about 10 minutes and sometimes causes me to force close Rhino. Once the pdf is inserted, updating the reference results in the same delay and or force close. Anyone else experience this?

Had this issue in WIP, Beta, and now in R8 Commercial.

Anyone have any better ways of externally referencing a spreadsheet or pdf? Never found a good way to do this in Rhino. For context, I am just trying to get a doors schedule into a layout.