The attack range and behavior of the Skeleton Mages' minions

Skeleton lightning mages minions launch an attack before reaching the damage range, which causes a situation where they stop in the distance and start spamming the attack, but the enemy does not take damage. At the same time, the minions do not come closer until they receive a separate command for this.

They also sometimes launch attacks through certain obstacles, such as large trees, through which their damage does not pass. This introduces an element of inactivity of the minions into the gameplay, which forces you to be distracted by their behavior, rather than watching what is happening on the map and your survival rate.

Yes, it's been bugged since release.
https://imgur.com/yyjHegU