We already managed to get finally rid of this problem with our current beta 2 dev version and so we prepared a package for beta 1.1 that you can play it online and on LAN without any problems.
Anyway, if you have problems again so you can be sure they are at least gone with beta 2 as we tested it 3 days long day and night
As usual the patch doesn't require any previous patches installed (that means patch 1 isn't required to be installed before that patch). so, just install it

Get if from the download section now!

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