It could happen that players in the Nether were teleported under the Bedrock layer by accident. This has been fixed with the update and should no longer occur.

In addition, it could happen that the server crashes or gets a really long error message if too many worlds have been generated at once. This has been fixed by loading all the worlds one after the other. The first loading of all farm worlds, takes a little longer, but the server should no longer crash or throw an error message.