Random crash when using tileworker

[v1993]

I've decided to try out tileworker and found that it sometime causes crash when taking product out.

First crash: crash-2021-06-21_15.18.14-server.txt

After the first crash, I've loaded the same world and tried to use tileworker again: crash-2021-06-21_15.28.35-server.txt

Worked the issue around by breaking tileworker and placing it again, worked perfectly since then. This looks like race condition to me, but I may be wrong.