Playing my monk on Forest Crossroads the siege spawned on the North East spawn point/2 o'clock
I had my barricade at the bottom of the ramp
My monk could not hit the sweat spot in the roller, two seconds before it could, once it reached the bottom of the ramp were it became steeper he could no longer hit the damage spot
maybe a few pixels up the ramp it was fine, and it was procing auto attacks fine due to running a lightning weapon with drench and it getting stunned from shock but as soon as it got to the bottom of the ramp ranged/melee could not hit it for whatever reason
that is about the position the barricade was in, didn't have time to take screenshot during due to final wave
With our weakspot size increase in our last update, we believe we've fixed this issue. If this issue is still occurring, please submit a new bug report, and we'll look into it ASAP.