Unicode character displayed incorrectly

I use an arrow character “YouTube​:up_right_arrow:︎’ to denote external links from my Wordpress blog. When the posts are retrieved from the feed to my timeline here they end up looking like this “YouTube↗︎”. Is that something that could be corrected, maybe an encoding issue?

The character seems to have been changed for this system. This blue box arrow is how they show up in the inkwell feed reader as well, which is fine.

This should be fixed for all new posts moving forward.