It appears the Russian aircraft was struck 22 miles off the Syrian coast.
Perhaps a missile fired at an Israeli aircraft went astray and locked onto the distant Russian aircraft, without the Israelis actively seeking cover nearby. I don’t think the Israelis were attacking from 22 miles away.
The problem with smart weapons is that they really aren’t that smart.
If the Russians are whining that the Israelis did not give them advance notice, the question is, if the Israelis had given them advance notice, would they have shared that information with the Syrians?
If the Russians are in the habit of sharing that sort of information with their Syrian allies, which seems probable, then giving them advance notice is the last thing you would do.
But they think they are, Dunning-Kruger Effect...