I just added a supermidi track to the melody track of a Real Track Style song (all RTs).
And I added a custom midi style to the soloist track.

Workflow: Right Click on the empty track in the mixer (Patches). Select options... done

I am now convinced it is workflow. There is a right way to do it and a wrong way.

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BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, Motu Audio Express 6x6 - My SoundCloud (Tip: No need to create a SC account to hear music - just hit ESC ).