So, I had these triggers with the following code on some L_ProjectileZone triggers:

event OnTriggerEnter(ObjectReference akAR)    Projectile myProj = akAR.GetBaseObject() as Projectile  ; then various manipulations of the projectile, like deleting it and so forthendEvent

and it worked fine.
Now it doesn't. Simply does nothing, and I get the following error in my log:
[ (FF000CF9)].ObjectReference.GetBaseObject() - "" Line ?
[ (19009B3F)].PCKP_Script_PortalProjectilePuzzleEnd.OnTriggerEnter() - "PCKP_Script_PortalProjectilePuzzleEnd.psc" Line 8

???