Ciencia_Al_Poder added a comment.
I've found that the fix is, in each script that use generators, change
gen = pagegenerators.PreloadingGenerator(gen)
with
gen = pagegenerators.PreloadingGenerator(gen, genFactory.step)
And that works for me.
That's because PreloadingGenerator has a step parameter that defaults to 50, and since none of the scripts specifies it, then it takes it as the current step value
TASK DETAIL https://phabricator.wikimedia.org/T94746
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To: Ciencia_Al_Poder Cc: pywikipedia-bugs, Ciencia_Al_Poder, Aklapper, jayvdb