The Russians can probably smell the weakness and turmoil in Ankara from Moscow.
Could also be to do with Ukraine. If Ukraine moves to reclaim her land, it will be Turkey who was behind her in the same way Turkey was behind Azerbaijan. All the ramblings and rumours of war not to mention the fact Turkey shipped UAV's to Ukraine in a similar manner to how they shipped them to Azerbaijan before her war makes me think that escalation in syria from russia, could be to do with Turkey escalating the situation in Ukraine. If Ukraine moves Turkey must be ready to move in Syria.
Me personally, watching Russian behaviour in syria i know it makes perfect sense to move into Ukraine and help her build up her military and her organisation capacity and then to have it move against Russian backed separatists.