On most pages entities are linked via their name. If those contain no visibly rendered characters it's rather hard to follow them. White space characters can be especially annoying. 

1. https://musicbrainz.org/release/b10beb49-3ba7-41d4-b131-78e85e11504a (U+1D159: MUSICAL SYMBOL NULL NOTEHEAD)
   • On Windows a visual representation (like on cover art) is rendered making it clickable but not on all systems it seems
2. https://musicbrainz.org/recording/b9f04c56-7397-4931-a9a6-41d1f32260ed (U+200C: ZERO WIDTH NON-JOINER)
   • Had to use an extension to more easily handle those