Description of the issue:

The dedicated server (not the game, singleplayer does not crash, have not tested LAN server however) immediately crashes when placing items on a conveyor belt. Starting the server again will not solve the issue, as the items are not deleted and they remain on the belt, causing an immediate crash again upon startup completion.

Singleplayer, as mentioned above, has no issue dealing with this:

Crashlogs, including mods with their versions

Forge version 28.2.3
Immersive Engineering version 0.14-94

• Minimal instance error
• Full crash report (including other mods, although they seem to be unrelated, as minimal instance produces the exact same error)

Thank you for your time and work.

Duplicate of #3734, resolved in the next release

^ that. Apart from that it's a very nice bug report (all the details we need, tested in a minimal instance, etc).