Path Traced fire playback problem

Hello!
I managed to make my fire to catch up the falling books:
https://forums.developer.nvidia.com/t/fire-is-too-slow-to-follow-my-falling-object/216187/4

This all works perfectly in real-time renderng, and also Path Traced fire renders out great:

But I have a small problem with Path Traced fire playback:

What could this be?
The scene is here so you can take a look:
PT_fire-problem.zip (25.8 MB)