Post title garbled i a list of posts

Hi, I run a private site and the member’s profiles are managed by a plugin called “Membership by Supsystic”. I use your plugin to make it multilingual and every thing works fine except for one thing. On the profile page “Membership by Supsystic” offers the possibility to list all the posts published by a given user. When this list is displayed the posts titles appear like this : {:en}English Title{:}{:fr}French Title{:}. Is there a way to correct this by adding some lines of code, a snippet, in my child-theme’s files, or somewhere else.
Thank you for your plugin and for your help.

Michel