I recently updated my phone to Android 5.0 (Lollipop) and have discovered that mod and community diamonds don't display in posts on the questions list or inside questions themselves in the Chrome browser.
However the diamond unicode character does still appear on the top bar of the site I moderate (UX.SE)
(Sorry for the lack of red lines, it's a screenshot direct from my phone so no drawing on that. Just use your imagination and picture this image with some handdrawn red circles highlighting the Community posts!)
I've checked against Meta.Stackexchange too and see the same thing.
I'm not sure if this is down to the new CSS updates that the UX site got, or if it's down to Lollipop as both changes happened on pretty much the same day.