Hmm interesting, I tried jumping and firing straight after, it didn't seem to fire until the jump had landed, I assumed that was because of the jump animation, but I guess not. Just try jumping and then fire while in mid-air mate, does it fire straight away?
Viewing post in Immortal Blessing jam comments
Ok I made you a youtube showing:
1. jump and fire at the same time - ok - at 10 second mark
2. jump then fire in mid-air (what I was trying to do) - no good - at 18 second mark
https://youtu.be/rrbD43CTRVk
But that's cool, as long as people do 1. it works.