After watching the Dorico video, I was successful (mostly) in getting MIDI triggers to activate Groove Agent beats. This is a great feature. I did run into some small issues with timing.
In the tutorial video, the trigger region bars appear to touch at both ends - appearing continuous. (If I enter/edit them that way, the ending circle handle for each region actually appears at the start of the next bar.) After entering some regions that way, sometimes playback will unexpectedly drop out.
If I instead place each right-hand handle just inside the final bar, the score shows small gaps between the regions but the playback seems to be better (no dropouts). The behavior seems to occur whether repeating the same trigger note, or changing them.
Is this some type of overlap issue? Perhaps I am missing something.
“Works for me” appearance:
Like tutorial, but problematic:
(I have had some erratic behavior using one trigger note on a long region - I seem to get better results using the same note several times over shorter regions. Maybe a different issue.)