Bug:

If two players place K&L inserters at the same time, using the UI for pickup and insert, the two inserters will switch place, and then if you remove or edit the inserter the server will crash.

There are 2 bugs that I've found so far, in which 1 is a game breaking bug.

1. Destroying a sign does not remove text or icon, the text stays on the ground.

2. After playing for more than 2 hours, one sign started missing letters. The text was initially: Alpha Coal Mine, but became: A p a Coal ...