If I type too many characters in the send window, nothing is sent and it is confusing for a brief time. Why not change color to say, yellow, when approaching the limit, and red and stop entering more characters (but do allow backspacing or deletion).[ Or some other user functionality as defined by the library]
The point being, I don’t know there are too many characters in the send field until I go to send them. I must delete some characters before I can send. It is very disruptive to a QSO.