I'm having a bizarre issue with some libraries only being played when they're in solo on Reaper. It's almost like I'm hitting a max polyphony somewhere. I have 16 MIDI tracks all sent to the right channels. Most libraries work fine, but when I load up something rhythmic like Sequis, it simply *will not* play unless I solo that MIDI track. It's so strange and I can't figure out what the issue is.
Anyone here have the same problem or thoughts on how to fix it?