This issue is about the barbed wire cutting you even when there is no barbed wire. When building a gate and attach + install the wire to the bottom section of a gate; you'll get cut when you cross the gate. This issue happens right after you install the wire to the bottom section and will almost cut you along the path of the gates opening.

For example, when the gate with the attachments are opened, crossing the path will cut you from either sides or center of the opened area between the gate. When the gate is closed but go to where the gate travels to its open state you'd get cut here too.

The only fix at this moment is dismantling the barbed wire before going through gates.