You can google inadvertent shoot-downs or weapons release due human factors and switchology mistakes for interesting reading on the relatively commonplace nature of such events.
Kind of sobering. This year google reports a NATO QRA fighter fired an AMRAAM by mistake or even moving to the brave new world of AI and networked systems the Indians shot down one of their own helicopters this month.
Running intercepts on airliners with QRA aircraft and war rounds is inviting Murphy's Law. Using airliners for SAM training probably not so wise as well.