We glock 17 slide stuck

[Tshiip]

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