Different result from multiple smoke sim resolution

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Hi everyone,

I was setting up some of the pyro sim here in houdini 20.0
And wonder what's the possible reason that the movement / look is very different when I have my smoke sim done in a higher resolution ?

All the setting is the same in both sim , just the resolution voxel size is lower about 50% .

Thank you in advance !

Attachments:
Smoke_mid.mp4 (4.0 MB)
Smoke_high.mp4 (4.8 MB)

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Forces are applied with slightly different values in each voxel, after a while the changes compound.
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Thanks for the info Tanto !

I was guess this could be the reason as well that the division of each voxels get more resolution hence the forces that get to pass on to the next voxel are being "lessen" in overall. But just wanted to get some other idea on this , maybe I am wrong or the idea isn't correct here.
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