check box field showing on/off when i am going to check/uncheck

when i am checking the checkbox on top of that it showing on/off.please refer below image

how to resolve this

Can you give us a little more context?  Where is this checkbox?  Can you post a screenshot of the builder properties for that field?  

If I had to guess - I’d say there is a custom field renderer on the field that is adding both the text representation of the boolean feield as well as the checkbox renderer.

But that’s a guess.