Walking fire continues walking after a bomb kills it

[HybridDog]

SuperTux version: v0.6.2-3-g40357959f
System information: lubuntu 18.04

Expected behavior

I don't know what should happen when a bomb hits a walking fire.

Actual behavior

When I threw a bomb onto the fire, it just continued walking and went through walls and on the air:

It does not hurt when Tux touches it, so the fire is probably dead.

Steps to reproduce actual behavior

Attack a walking fire with a bomb.

[Ordoviz]

I can reproduce this. You need to walk into a flame while holding a bomb. The flame then flies off the screen, heading diagonally downwards.