Community
I am having this issue with my assemblies and have tried adjusting every visual/graphics display setting and this issue will reappear without fail.
update graphics card driver (or try a different version)..
It would help if you posted your card and the current driver too..
You will need to go here and download a newer driver for your video card. We do not like to see a driver out of date for more than 6 months with Inventor usuage.
Regards,
Don