flstudio you have to output the mixer channels to the hardware input device, which makes sense but was jarring considering this so anybody who's ever had that issue, that's why some rewireds don't play sounds if it's not routed ...
FLStudio 20.6.2
Build 880
Mac OS 10.14.6 Mojave
I am currently running the latest FLStudio for Mac and for some reason the midi notes in piano roll plays back differently from what I record on my midi keyboard ...