Here's hoping there is a fix for this sooner than later. I thought I was losing my mind until I found this thread.
I'm using Sonar Producer 8, and have gone through numerous midi controllers over the years since the Pro Audio days and every version of Sonar since v1.0
It is exasperating to open a project from a year ago and have all of your midi ports pointing to the wrong synths because a piece of hardware dropped out of your setup or an additional one was added.
I've set up my templates repeatedly with Midi Omni in-- all devices all channels. This works for awhile, but sometimes a device has a problem and doesn't show up --BOOM, the inputs revert to something random. I had them set to Omni all devices on every single instrument track so I could utilize any keyboard or controller on any highlighted track. Today I added an additional midi USB device, and Sonar decided to switch every single track from OMNI to just the first device--I have to reset the midi in port manually to use any other device. This impacts every single project, new and old. My template is now screwed up as well. It gets worse, because often after this happens and I've reset ports, I'm finding that Midi input is coming in fine (according to the keyboard in the system tray), but the midi track refuses to acknowledge any data coming in from that or any port (OMNI or otherwise). I've easily had this happen a dozen times since Sonar 8. Reassigning the port back to omni or even to the specific midi in port has no effect. I have to reboot Sonar to get it back. Maddening!!!
The synth assignments are very easy to throw out of whack with the new "instrument track." Midi tracks get re-pointed randomly from one soft synth track to another. I have zero faith that I can simply open a recent project and render it without going over everything with a fine toothed comb. The comments about notebooks and binders and writing down settings are spot on--having to manually tweak and re-tweak these sorts of settings in a project is unacceptible.
Please keep this on the very front burner. Thank you. I really do love Sonar, but these kind of issues seem to go on and on, based on this thread.