I found a weird bug that cost me hours of work x0
Basically, the spawned event can't load new (in my case triggered by self-switches) event pages in "Autorun" mode.
I don't know maybe I'm the only one who got this bug xD The solution is to change the event page from Autorun to Parallel, or to change it's self switch before it gets spawned. I'm just posting this in case someone else got this issue.
Srry didn't mean to sound frustrated. I've tried YEP's and GALV's plugins before that and it's by far the best one :)