If you make any errors in entitygroups.xml and ignore to fix it within 10minutes. The coppi mod will start to reset all your server regions.
Just wanted to let you guys know. If someone of you experienced this now you know why.. I suggest coding custom zombies making sure error free and loading them correctly in entitygroups.xml before putting them on your server.
Happened to me, then i've repeated the process to make sure that was the cause and it was positive.
Joe,
Monday, December 19, 2016