Paper Server crashed on /arm sellback

[Haui1112]

So today I started with arm, a godsent imho. People on r/admincraft recommended it but warned me it'd be "on the laggier side". I figured I'd try it and it works like a charm.

Although, I am trying to divide my survival world into plots (256x256 to buildlimit up and down) and have every player be able to get one or more.

When making the plots (post a sign [arm-sell] R World2 R plot001 R 0, it makes the server stop dead in its tracks for 4 seconds approximately. Nothing else makes the server behave like this.

Today when I tried to /arm sellback a plot I bought for testing, the whole server crashed at once. Here's the error message until shutdown. https://pastebin.com/U2hhtK6a

From what I read it seems worldedit is trying to restore the whole area despite no changes. I find that quite scary as this would endanger my server.

I'd be very happy if someone could point me in the right direction on this. Maybe disable snapshots?