Now Russia is getting concerned about the plans of Turkey, for Syria.
https://www.rt.com/news/481183-russia-turkey-idlib-operation-worst-case/
Turkey sending troops to Syria to fight against the government would be the ‘worst case scenario’, Kremlin spokesman said after Ankara threatened that such an operation was imminent.
Turkey’s President Erdogan said on Wednesday Ankara was prepared to launch a military incursion into Idlib to force the Syrian army out. Russia’s reaction to such a development would depend on what goals the Turkish troops decide to pursue, Kremlin spokesman Dmitry Peskov said.
The only explanation, I can see for the imminent invasion of Syria by Turkey, is that Turkey wants to steal Northen Syria.