I want to make a song ending where the last two bars/measures have whole note triplets over the first 6 beats and then stops at beat 3 of the second bar.
In other words, in the last two bars, the instruments play in 6/8 but over the original 4/4 tempo.

I've experimented with rests and motifs in microchord settings and changing the time signature and tempo but can't seem to get what I want.

I'm particularly confused by the fact that the microchord dialog box still shows 4 beats when the time sig is set to 3/4! Is this correct or have I uncovered a bug? If this is as intended, how can it work?