Maxwell's clones with machete fail to execute actions consistently

I spawned a clone and then tried to cut grass with a machete. Clone has got it's own machete and tried to mimic my moves but sometimes failed to do so. I can see two problems with that:

1. Clone was too slow - it tried to mimic my moves but cancelled animation before actually cutting anything. Sometimes it worked, sometimes it did not.

2. Clone was too far away from the grass but tried to cut it anyway. I might be wrong but it seemed like it was targeting a grass that was already cut down (I was close to one of these big areas with grass and bugs)