In the patch notes it says:
"Sheilun’s Gift now activates Soothing Mist."
http://blizzardwatch.com/2016/10/24/...1-patch-notes/
But it doesn't seem to do so. Have I misunderstood something?
Edit: No response just yet from Blizzard as of 11/6/16, but just to update this per the discussion below, it appears that Renewing Mist is the culprit. Casting RM stops Sheilun's Gift from triggering SM anymore until you've manually cast Effuse, Vivify or Enveloping Mist. Once you've cast one of those spells it works again. This edit covers posts below through #16.
Edit 2/15/2017: This bug has been fixed.