Well, this is the first time I've seen it.
It seems that Inno, in its never-ending quest to make us players crazy, has made a change to how we get troops we've won. For years (actually up to this event) when you won troops you got a 'clickable' icon in your Instants. When you click on it and the troops get added to your troop total....this is apparently what is called a "Unit Refill".
HOWEVER - NOW: when you win troops in certain situations, they go straight into your troop total. Bypassing the 'clickable' icon in Instants. These are NOT "Unit Refills". I guess, in this event, ONLY if you win troops as a Daily Prize (?) do you get the 'clickable' icon in Instants - which then comprises the new "Unit Refills".
So - in this event so far - there have been no troop Daily Prizes. Yet, an early-on quest demands them. Catch-22. {8-0