Can't "Uncheck" checkboxes Field once they are checked once

Can't "Uncheck" checkboxes Field once they are checked once

Hi there guys,

Since last week we're having issues with Checkboxes Fields on ZohoDesk since when we try to "Uncheck" them they are going back to being Checked even when the "Enabled by Default" setting is off.

Please your help with this issue since it's impacting us badly

I've attached a video to demonstrate this more clearly

Thanks in advance