Can't say for sure, but it happened around the same time. I've searched all over the net for fixes for issues for my Galaxy s6. Seems like many people have same issues but the solutions won't fix my issue. When I receive text messages they only come thru with vibration, no sound. This only happens with text messages, app notifications still work with sound and oddly enough has happened with my GF phone too at same time shortly after new update. To be clear, I've checked all settings numerous times and each setting is on or in the correct setting to receive sound notification when incoming text arrives. Thoughts?