How to reduce ionic checkboxes event width

I have recently got to update a Ionic App.

On its forms, every checkbox has the same behavior: No matter the size of the row, each one of them is clickable or their full width, not only on the checkbox module.

I can't get how it works, and if I can change this, in order to have the clicking event triggered only on the checkbox, and not on the full row.

Here's a simple playground that show the behavior: http://ift.tt/2maA3Pq