WP.me linking to 404

All of my wp.me shortlinks direct to a 404 page rather than the article that I grab the shortlink from. Could someone please help me with how to fix this?

Here is an example:

The shortlink: https://wp.me/p4wW2o-7E
The actual post: https://blog.dogsenseunleashed.com/2014/07/14/every-loving-dog-owner-needs-little-dogsense/