apply grain not working

[TargaryenWindy]

from where the grain table was extracted

grain table applied

[igowrek]

I suspect it has to do with how many grain tables are actually extracted.
I encoded a movie with svt-av1 and film-grain and extracted tables only had ~1 table per 2 frames.
So, I'm guessing inserting that extracted grain would result in issues, and also lower number of tables means the random_seed value for missing tables is also lost, even if they reused the other frames' parameters.