N10 really acting oddly

Just finished a soundtrack for a 90 second video. Nuendo 10.0.2 was acting very oddly. Besides my well documented issues with the Marker tracks ( they were in rare form this weekend! I could NOT get the start and end points to stay put! :confounded:), it developed this new quirk where it would not let me change the label of an event! This was a 1st! :flushed:

Normally, I pre label the track and then make adjustments in the description window. But sometimes, because of misspelling or maybe an omission, I need to go back to the track window and change the text. Everytime, I hit enter, I got an error message saying that I could not change the text! WTH is that about? :anguished:

Anyone have any ideas how to correct this?