We have some good news and progress to share. NVIDIA has been able to reproduce and fix the issue. They are currently working on a fix to be available in the next NVIDIA driver posting. We do not yet know the date of when the driver will be available but will let you know when it is.
Please vote on the issue here: https://illustrator.uservoice.com/forums/601447-illustrator-bugs/suggestions/31557382-outline-preview-bug We will keep you posted on the UserVoice about the progress.
Thank you NVIDIA
Some technical details: The only affected systems are MSHybrid + Windows 10. MSHybrid is short for essentially, a system that houses both discrete GPU and Integrated GPU.
Meanwhile, additional keystrokes can help you.
Keyboard shortcuts – CTRL+E toggles GPU and CPU mode – CTRL+Y toggles between outline preview mode and the last preview mode (GPU/CPU)
WORKAROUND
1. if you have to move to outline mode press CTRL+E before to get into CPU mode and then press CTRL+Y
2. If you have to come out of outline mode press CTRL+Y you will come back to CPU preview mode as that was the last used mode in step 1.
3. Now press CTRL+E again to get back to GPU mode
4. repeat steps 1-3 each time you have to go to outline preview mode.