Cannot edit notes in a specific record from Mac. I can do so on my iPhone by pressing "Tap to Edit"

Thanks for your reply, Jack. Later in the day, I reopened 1P to update a different record and the behavior was normal. I checked the record that prompted my query and it, too, behaved normally. Obviously I cannot account for that one-time experience but I will definitely refer back to this exchange if I observe the behavior going forward. I make extensive use of the Notes field, as 1P has evolved as my go-to platform for much more than just passwords! Cheers.