Okay, so straight up sometimes goku's Kamehameha just will not fire.
Charged, uncharged, midair, angled, zilch.
And then other times it just "turns back on" and will fire.
I've seen it happen on Sector Z more than not, but even on really REALLY simple stages like F.D it'll just turn off.
Doesn't seem to have anything to do with damage percentages because it happens at 0 and at like 150+
It's kind of hard to "Catch" in an image or video simply because it just kind of "Happens".
This is all ENTIRELY offline. It's not lag or anything like that, nor is it something happening in like 6 man brawls. This is "Everything is fine, he just won't shoot" territory.