Monitoring Delay Cubase 10 Pro (Live Sound) Sucky Components. HELP!

So I use Cubase 10 pro to livestream our churches services. So the way I have it set up is the board we use (si expression 3) sends signal through usb to Cubase 10 on my laptop. It is mixed and then sent to a stereo output back to the board and sent out the board into Boxcast (our streaming provider) The issue I am having is sometimes (not all the time) one of the channels is delayed but the other channels all are fine. The channel that is delayed seems to be random and I have tried everything I can to figure out why it seems to be doing this.