Can't mirrow from iPad mini/MacBook pro/iPhone6 to Apple TV

Hi there,

since my last iOS 8.1.3 update I can't see the mirroring icon anymore on my latest devices to my apple TV.

Check all points written at : Resolve issues with AirPlay and AirPlay Mirroring from iPhone, iPad, and iPod touch - Apple Support

and still can't see the icon for mirroring.

Same WIFI, all updated, AirPlay enabled, tried reset and restore, and at my iPad/iPhone 6 I get to see only the "Air Drop" icon, not the Airplay icon as in the past.

what could it be???