UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36

Example URL:
https://jsfiddle.net/JoolsCaesar/5wuk5g7k/

Steps to reproduce the problem:
1. Navigate to the above URL
2. Select the word (or subset of) "Anything" or "Something"
3. Click the checkbox label, "My checkbox"

What is the expected behavior?
The checkbox should toggle.

What went wrong?
The checkbox does not toggle.

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 63.0.3239.84  Channel: stable
OS Version: 10.0
Flash Version: 

It will however toggle if you double click the label.
It will also toggle if deselect any selected text

I don't care if the text gets deselected or not so I've added a workaround which manually deselects the text. Activate this by hitting the "Fix" button.

This applies to both checkboxes and radio buttons.