If you have already tried closing and reopening the file, and you're still missing elements, check your version history. See if there is an earlier version with all your work. If so, try restoring the earlier version.
Read more about Version History, and how you can restore or duplicate earlier versions of files.
If you're still having issues, please send us your GPU details.
- Visit chrome://gpu in your browser
- Save that webpage
3. Select Webpage, Complete in the Format dropdown menu
4. Save and then reply with the attached file