Can't Select Text with mouse

I am using the AddToCopy module on my site. In its configuration, I have set the 'Minimum text length' value to 25.
Now when I edit any node, I cannot select text (with my mouse) more than 25 characters from any text field.
When I changed the 'Minimum text length' value to 5 -> now I cannot select text more than 5 characters.
Also, this happens only in Chrome. It works fine on IE 10 and Firefox.
Can someone please guide me in this issue.