It is a lie launched to cover the fact that all the collateral damage in Ukraine is by criminally positioned air defenses which are supposed to defend the approaches to targets, not to use civilian infrastructure for cover.
I am sure that this Polish case is not an accident on top of that. Ukrainians were seeking to provoke an incident this way.
“criminally positioned air defenses”
Not a thing. Air defenses are exactly that, defensive in nature. The customs of war permit such within “civilian” areas.