Mordekaiser shield not working with Runic Armor

So now that riot has given us a potential way to use a different mastery build on mordekaiser with buffing Deathfire Touch it opens up the possibility to put 12 points into the defence tree. After some testing i noticed that Runic Armor is still not working with Mordekaisers passive which is a known bug for 2 months now.

Would appreciate a fix.