im p sure this is the longest existing bug in the game
it will be fixed in v0.12.1 tho
basically attackboxes and crashboxes dont extend far back enough so exterminators just ignore some trashies that they are on top of
yes my main problem was that if you had something like colossus in the fence lanes of highway and placed a barricade there
then colossus just wouldnt be able to do anything because its attackbox would be completely out of range
or also in the manufactory where the vroombas spawned in by the machine doors would ignore trashies on the tile they spawn on
and attack the trashie to the left instead