Skype link not working

One of our authors is using Skype has a contact method in the Author Box.
The Skype button shows but it will try to open a web page like https://<skype_username&gt;, instead of opening a chat in Skype.

I’ve tried to change this to something like skype:<skype_username>?call which works in my own page, but it gets deleted if I use this in the profile. How should we use Skype with the author box? Thank you

The page I need help with: [log in to see the link]