The rework to creep attack detection attempts to cut down on the number of false positives. However, they do still happen, albeit rarely.
Note that it is entirely normal for no towers and rocks to be blocking and the creeps to think they are blocked. This is due to creeps being able to block other ones temporarily. A false positive is a situation where they do not resolve the situation on their own and instead attack.
The rework to creep attack detection attempts to cut down on the number of false positives. However, they do still happen, albeit rarely.
Note that it is entirely normal for no towers and rocks to be blocking and the creeps to think they are blocked. This is due to creeps being able to block other ones temporarily. A false positive is a situation where they do not resolve the situation on their own and instead attack.