First load glitch

Hi guys.
I'm developer of this map http://www.epicwar.com/maps/240271/ (map optimized with vexorian's map optimizer)
For some unknown reason functions work wrong at first load.
for example function that determines item drop rate seems to work very very slow. but It only happens at first map load. When you restart the map all systems works normally. unfortunately first impressions are the most important and map some times crashes by this reason ( old players with new players makes map crashing).
I put the link here for checking the error (noone has noticed about this until the map was released)
My question is if there is something wrong related to first map load. I've searched in the forum but nothing appears.

Have you tried isolating the error? Like make a test map with only that function?