Hi there,
It happened again yesterday (2025/07/10), I had to do the lyrics editing in a separate Windows notepad, copied the text one phrase at a time to the Windows clipboard and then pasted it back to the Cakewalk Sonar lyrics window using the paste function of the lyrics window. It's a workaround that I think of (if I cannot use Cakewalk by Bandlab). But it's a trial and error experience that worked.
I'm certain that it has nothing to do with the monitor. I use
the one monitor builtin to the notebook computer.