If you connect the outputs of three not gates together using only one redstone wire piece per connection, the server freezes. If you use longer chains of redstone it adds slight delay and will often cause the gates to get into a state where they are stuck in an impossible state where two gates in a row are on, this stops the runaway loop. The server I am on has decided to not use craftbook till this kind of breaking of server is fixed.

This has been fixed since last official release (though I would not actually run the current unreleased version yet).

ICs can just be disabled separately in the meantime.

Current unreleased version has propagation delay implemented.

This kind of error should not occur again in the future.