In Visualize I have a multipart assembly, I cannot Right Click - Show Only on any part. If I do the whole assembly disappears.

Right click - Hide Part: Works absolutely fine.

Right click - Show All Parts: Works fine when needed.

The only work around I have is to manually hide everything around the part I'm trying to focus on, but this is highly time consuming given the number of parts involved. Am I missing something massively obvious? I should also note the Selection Tool is set to 'Part' also.