Since around the same time as I allowed Mac OS Ventura to update to 13.6.5, my MIDI studio in Audio MIDI Setup has become totally corrupted and non-functional.
The items are not arranged as I left them, all the cables/wires are gone (though the connections claim to be present when rolled over, and I cannot create new connections since they're apparently there), the objects display with black/grey boxes instead of their icons (see attached screenshots), and I cannot remove any of the objects (most of them have the minus button enabled, but it does nothing; one device that I no longer have connected wont even let me click the minus button; the menu choice for "Remove Device" does nothing, and the delete key does nothing).
While trying to troubleshoot it, I created a duplicate configuration, which fails to actually load unless I quit and restart it, and then it has the same dysfunction. Trying to change back to the Default setup has the same problem of not loading ("Loading" appears on a blank background and never changes).
Whenever I change the view mode from icon to list and back to icon, the arrangement of objects goes back mostly to what I had... until Logic starts or I reopen Audio MIDI Setup. And just a short while ago, it either changed some of my devices into generic "New External Device", or added new ones. I'm really not sure which actually happened. The list view is also corrupt as there are no devices listed and trying to add connections in that mode doesn't work at all.
The OS update is the only meaningful change done to the machine between when everything was normal and when everything went to hell.
Anyone experiencing this? Any known solutions?