In my humble opinion this appears to be nothing more than a pronounced case of lag. Some years ago I captured video of another Ork riding away from me in Eataine displaying the exact same behavior. I thought perhaps he just didn't like me, or something. That video is still somewhere on my Youtube page, and clearly illustrates the same phenomena. During one period of time on this server I routinely saw such, but never thought anyone was hacking. I just figured it was something with my configuration and turns out I was right.
I toggled this and twinked that, frameled my discombubulator and installed HAL-9000, and now everything is fine. Except he will never open the door...
Wait, I found the video. This was posted to Youtube back on March 27th of 2017. Watch and you will see the exact same thing is happening as you are experiencing now.
Click here to watch on YouTube
Hope this helps.
EDIT: You can also see where I made a couple of attempts to hit him, but the attack wouldn't fire. This, of course, illustrates the visual glitch in the matrix, as my target was actually further ahead of me than depicted. It is also evidence of brain-eating Zombies, I don't know, you decide.