The hit detection for the bazooka is buggy. I used the bazooka from long range with very little arc on it, and the trail of smoke went directly through the enemy worm and missed.

Later, I also used the golden bazooka from close range, direct aim, and it again went directly through the enemy worm.

I noticed this two times, and maybe it has something to do with the Diver hat.
did the target worm wear a Diver hat? it's probably out of the collision mask.

Same thing happened to me just now... didn't pay attention to what hat the worm had.. but the trail of smoke went straight through, center mass...

Thanks for reporting this guys. I have bugged this for the team to look into.

I just had it happen again. Golden bazooka, straight shot from distance, went right through a worm with no hat on.

The team are looking into it, it should be fixed in an upcoming build.