No, I don't have any control surfaces listed.
So, I submitted a ticked to support so the issue gets logged. In the meantime, the issue seems to have resolved itself. How? I have no idea. I'm going to changed this back to 'solved' for now.
Is there a way to roll back to 2019.12 to rule out the possibility that the update caused it? I haven't had to roll back since SPLAT, so I don't know if CbB still allows it.
I don't know what I did, but my MIDI controller is no longer recognized in CbB. I opened standalone apps like Addictive Drums and Battery and the controller worked. So, it seems to be isolated to Cakewalk. My Saffire is checked under MIDI Devices settings. Is there a setting somewhere that I inadvertently switched off?