Checkbox for saving comment name/email not working

If you go to Settings > Discussion and enable “Show comments cookies opt-in checkbox, allowing comment author cookies to be set” and then try to tick the checkbox on a post with open comments, it is not possible in either latest Chrome or latest Firefox on desktop. Clicking the checkbox does nothing.

This is the box for reference:

I traced the problem down to the -webkit-appearance: none; rule that was added in 0.1.6.

If I add the following rule to my CSS the checkbox works again.

#wp-comment-cookies-consent {
    -webkit-appearance: auto;
}