Boneshatter bug ?

sometimes in 1 map my boneshatter does the full aoe dmg and full clearance no problem but sometimes for some reason it doesnt do the full aoe and doesnt seem to do full dmg. 1 map to another it change for some reason... is it a bug or im doing something wrong ... im so confuse why it does happend

My guess will be that it has to do with stun. You need to stun to proc the aoe pulse, so anything inhibiting your ability to stun on the map might be making the clear feel worse. There's quite a few mods that will do this.