Apparently, the “title” meta tag of each and every one of the various video, audio, and subtitle streams in your MKV file has been sprayed by the release group with their “stench mark”.
Get MKVtoolnixGUI to take a look at these tags directly and to edit them individually.
See How to remove tag spam and set language in several MKV files at once for some ideas how to treat several files at once in the same way (e.g. like often needed with a tv show).
