Still no chemical reaction occurring

Hello everyone,
While browsing the post, I came across this case of methane combustion, but even after debugging, there was still no chemical reaction occurring.
[No reaction shows when using DEM with reaction - #5 by chunlei]

The chemical reaction rate is consistent with the user guide. Can you help me understand why? (7.0 MB)

Hi @PoorWesley
I just got a chance to look at this case.

I added a monitor for maximum reaction rate, and I am seeing a non-zero rate