This bot is still broken; you can't fight more than two of them at once! Besides having no collision effect, they're too fast to be killed before they destroy your arms, or even kill you very quickly.
This beast has been broken since launch and hasn't been fixed yet! The best thing would be to nerf it heavily or make it a solo mob! Encountering a group of these in a location is certain death with no chance of survival because they ignore doors and climb almost every high place they can reach, not to mention they'll go to hell after you.
I'll wait for updates before playing again.