Do you regularly use incognito mode while working? If so, make sure to enable this setting for your Chrome extension.
Click the 3 dots in the upper-right corner to open the Chrome menu
Go to Extensions, then click on Manage Extensions
Look for the Grayscale Chrome extension and click Details
Scroll down to Allow in incognito, and enable it
You're all set! Your Chrome extension will now show up in incognito mode.