Some people are crashing by entering my parcel

I don't know why, but some people (4 total, so far), say that by entering my parcel, they crash.
This morning, I worked with one guy who has this problem with my land. He crashed teleporting there, and said he crashed even walking there. But when I was online and in the parcel, he walked up and had no problems.
So I made a separate little square of land that is connected to the parcel, and made a landmark to it so he could teleport there.
I just got an email saying he's crashing again.
Any idea why?
My land is at Zeuzera <228, 105. 113>

Thanks for your help.

Owner

Zeuzera has crashed me constantly since the last maintenance.
I was doing money trees using the money-tree hud, and every time I'd go to Zeuzera (don't remember the coords) I'd get kicked.
There were a couple other locations that would do that also, one was in Moth, don't remember the other.