In case of bullets and bullet_hit_block, the break particle usually pulls its texture from the block that is hit by a projectile.
I some cases though, the missing texture texture appears when hitting blocks from a certain angle/position.

"Cause I'm wondering if it's grabbing the air above the block if you hit the top half." - Don, regarding the error

Full auto smokeless FT for testung purposes:
full_auto_ft.jar.zip

Fixed in V22.6.0.