When Zwift is configured for Minimal UI mode, powerups don’t work at all.
E.g. in my Fierce Felines event, I have custom powerups configured so that no XP is awarded, so you’ll always receive something going through a banner.
But in my race, looking at my Companion App, I never received any powerups.
This is a bummer for me! I love the minimal UI look, especially for climbing the alpe, I don’t care about my time on the sections or even my overall time but in minimal UI mode there’s no spinner at the top, or prize, so for anyone trying to maximize XP and level up quick, there goes some good bonus XP. This also adds up in missed XP when riding the TT bike and doing laps on Volcano circuit or Paris, since one hits the arches so frequently.
Another head-scratcher from Zwift. Why this option was never implemented within the game itself is beyond me.