Problems with Groove Agent SE

I play around with Groove Agent SE. How can I use the ‘half time’ in the pattern with Create Midi Trigger Region or as a pattern-insert in play-mode?

When I choose ‘half time’ then there is no sound.

I don’t believe it’s possible to activate or deactivate the “half-time” button by way of a MIDI note or controller, so unfortunately so far as I know there’s no way to handle this at present.

It is not special the midi note controller. You can’t also drag the pattern to the play mode. And the sound stops working.

I’m not sure exactly what the “half-time” option does, but Dorico itself doesn’t have any control over what the plug-in is doing, or indeed on what MIDI is produced when you drag the pattern into Dorico.