Updating the whole thing, my glock works like a charm, right now, I played manually with the hammer and it started working great again...
Just one magazine that is giving me a weaker blowback and firing the 2 last bullet in automatic mode and empty the gas left. If it doesn't do that the slide catch won't work at all...
I wonder if changing the vavle will fix the problem, I tried lubing it ALOT (the output valve) and i'll see what it gives tommorow...
I made a video about the problem, here it is:
https://youtu.be/DHd6_2Wpr6A
Thanks in advance,
Tshiip