Nougat - S-Voice not working correctly

[AC Question]

I have updated to the new OS fine with no problems. Now when I try and use S-Voice to call my wife it doesn't recognise her name any more? It simply keeps asking me who to text/call?

My wifes name is Lindsey, not a difficult name.. it worked fine on the old OS?!

Samsung S6edge, Android 7.0 Nougat