I’ve posted previously about this bug noting the automation breaking only, which generated a bunch of troubleshooting automation suggestions. But what I realized ALSO happens when this occurs is that three things actually occur at once:
1.) The automation system breaks (get’s “locked” in write mode)
2.) The Undo Function breaks (no undo available)
3.) Autosave stops working
I think it’s safe to say that this is some kind of genuine bug, and not a midi feedback related automation issue.
Perhaps you’ve noticed only one of the three issues? If you have, can you test the others?