I Think i am having the same problem, i once though it was black holes "They do" but i set them to only eat players and that stopped black holes crashing server (for only 2 seconds) then i came across this Post and it may answer most of my Questions. My Server crashes quite often, i heard pop ups can cause this but i limited pop ups and that didn't work and its strange when new players come one and they use wards and after them using wards about 5 minutes later my server crashes.
eventscripts_debug 5 i will try this then look in the look file after a crash and post it to you guys, but is there any Solves on this mystery yet? xD