On the spectrum of cheddar offenses, this is nothing
there’s some confusion over FIDE’s dress code.
Vague rules definitely serve a purpose.
vague rules exist to give jurisiction the abuility to make calls, however if the judges cannot even define what each type of shoe is, then the rule is useless.
Certainly, although this is assuming the judge will act fairly. It could be that the judge just didn’t like her, for whatever reason.