ORAC
Not how I read that article at all. You're making assumptions that aren't there.
It states the SU22 was wings dirty, tipped in for an attack and dropped munitions. It doesn't say it had dropped all its stores, was clean at the time of attack or was leaving the area. Other reports suggest he was repositioning for a second run before being engaged. Still very much valid inside self defence ROE.
Later in the article it mentions a second SU22 which was intercepted then seen to exit the area.