Category Color Coding not viewable by Delegate on New Mode

Ran into an issue when helping a user today of not being able to see the color coding of a shared calendar. User is a delegate for someone that has their calendar items color coded. I've toggled permissions and we've removed/re-added the shared calendar in question. This happens in New Mode. When reverting to Legacy Mode, the colors are viewable on the shared calendar.

I've tried most things except for a complete reinstall of Outlook. Any thoughts?

JB