Image becomes corrupted with blocks of missing pixels and repeated patterns

• While working on a document in photoshop, the image spontaneously corrupts. Blocks of pixels are deleted, and repeated blocks of patterns and colors appear.

• Additional actions, including "undo," creates more corruption. The corruption continues to worsen with each action taken until I quit and relaunch Photoshop.

• After quitting and relaunching Photoshop and re-opening the file, I see that additional corruption has occurred since I quit Photoshop. However, working on the document no longer creates additional corruption.
• The pixels are actually modified (i.e. deleted or replaced with a different color). Deleting layer masks and adjustment layers does not resolve the issue.

• This issue has occured in five different documents on three different days.

I do not believe this is related to the extention Coolorus as the same issue occured on a different document prior to installing Coolorus.