The F-22 was approaching Russian attack aircraft at an unsafe distance, shooting heat traps that could provoke a plane crash. As soon as the Su-35C appeared in the area, the American plane hurried off.
Now this incident in the Syrian sky is commented on both in Russia and in the USA. The incident was promised to "sort out" by US Secretary of Defense James Mattis.
From his statement:
We will definitely figure it out. While I can not give an exact answer, whether it is a question of unsafe piloting, pilot's irritability or persons who are trying to do unreasonable things.
It should be noted that the United States accuses Russia of violating the “air border” that separates the zones of air influence in the sky of Syria. Agreements on such borders allegedly were previously reached. The Russian Defense Ministry reports that no Su-25 "red lines" were crossed, and the actions of the American pilots became a provocation, which was skillfully stopped by Su-35.
In addition, the Russian Defense Ministry stressed that by definition, there can be no “zones of American air influence” in Syria, since the US troops are in the SAR illegally.