Fireball won't destroy all powder snow which is on its track

Fireball won't destroy all powder snow which is on its track.

How to Reproduce:

1. Use command /fill to fill lots of powder snow.
2. Put a dispenser outside facing powder snow, and put a fire charge in it.
3. Shoot fire charge.

Then set gamemode to Spectator Mode, and move into the powder snow, you can see that some powder snow on the track not destroyed.