I have a license for Apple Remote Desktopso. I gave it a whirl. Same results.
I then tried Insert Text Into Restricted Field with Apple Remote Desktop.
Same results.
I then tried Insert Text Into Restricted Field with a second delay before each letter. Success!. Tested on a second device. Success!
Thought I'd try with Screeen Sharing once more with Insert Text Into Restricted Field . Success again!
Thanks to all!
Cheers
Keith