"flamethrower" animations hangs the game?

[Ghoul [BB]]

Sometimes (rare, but very disturbing...), when npc character (fire geckoes, super mutants) fires flamethrower, fallout "hangs".
What's wrong and how to fix this?

 

[phobos2077]

Which mods and sfall version do you use? I never experienced this.

 

[Ghoul [BB]]

I got this bug before I installed sfall. Patch1.02d only.