Pressing play lowers osc 2 by two octaves

[mia_mc]

I've never had any problems with my BSP until today when I noticed that the transport controls seem to send midi cc's that mess with the Roland System-1 on the other end. Record and Play/Pause all lower the 2nd osc by two octaves. I can't find any solutions to this (besides just turning of receiving cc's on the system 1). Hopefully someone has some idea of what's going on.

[mia_mc]

Didn't have access to a computer before. Now I see I can just turn off midi cc's from the transport controls. This fixes my problem, but it still gives me no answer as to why it started happening.