Update to my prior post - 3 posts above this - Resolution found.
Problem description: iPhone/iPad's Storage Category bar is all grey! Deleting the Shortcuts App causes the iPhone/iPad storage's "Other System Data" to become Zero KB, and results the Storage Category bar to become confused and all grey color. Don't delete the Shortcuts App! Tested on various iOS 14.x and devices with same results (including iOS 14.5 and iPhone 12).
- Reinstalling the Shortcuts App does NOT resolve it
- "Reset All Settings" does NOT resolve it
- "Erase All Content and Settings" RESOLVES it and seems to be the only solution to my knowledge.
NOTE: After the erase procedure and the basic vanilla OS install (without any personalization), I deleted the Shortcuts App again (to test) and the bar became grey. This is a bug that is easily reproduceable.