If i'm right, then you are running a script for the comp like "Expantion Zerg Campaign Difficult". this is causing the comp to burrow the lurker, so it can attack. since you need to load it in the beginning of the game, you can set a wait period for the script.
Conditions:
always
Actions:
wait 30000 millaseconds
execute ai script 'expantion zerg campaign easy/difficult/insane' at location X
Finally finding about some of the bots that are flooding the users online - bytespider apparently is a huge offender here - ignores robots.txt and comes in from a ton of different IPs
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.