Contact Form new field unchangeable and indelible

I made a mistake in building the Contact Form. In a new check box field I forgot the comma between the two values; the second on the new line.
Saved.
The field could not be modified or deleted any longer, and I had to throw away the Contact Form element a start again from scratch.
If the bug is confirmed, it's a boring one! If not, I am a boring one!

Hi
I have this in mind, also with the recipient problem. I will work on it soon
CEd