Dorico 5 not sending tempo changes to Groove Agent?

I’m having trouble getting Groove Agent to respond to tempo changes in Dorico 5.
Both a fixed tempo change from 74 to 84 and a gradual Accelerando are ignored by Groove Agent as well as a different drum kit VST I use. In another DAW both drum kits observe tempos changes. Yes, Follow Host is selected in the drum kit VSTs. The initial tempo is respected. Tempo changes are not.
Can anyone please shed some light on this?

Dorico 5 is not (yet) programmed to relay tempo changes to VST’s. That feature is still to come. When? Unknown.