What is this? When I play the note E4 on my midi keyboard, whatever action I performed last in Nuendo gets undone. If I added a track, it disappears. If I recorded audio, it disappears. If I cut audio, that cut disappears. Etc.
So, this midi key is undoing the last action, and repeatedly pressing it keeps undoing further actions.
What the heck? Needless to say, it makes recording midi by keyboard impossible - unless I skip this note.