Weapon Fire Issue on landscape. Collision, Gravity?

I have this error with the weapon. It does not work properly anywhere except the very edge of the landscape! It is like I am firing at an invisible wall? I did try to alter collision settings, overlap events etc… any ideas?
I uploaded an unlisted YouTube video that highlights the issue!

Thanks a lot!!

219288-aaaaaaaa2.png

After a little search, I found a way that works. Select all Foliage Spawners, go to Brush component section, Collision Presets → No Collision! Then Resimulate spawners.