Nope ! There is no such thing as no bindi on certain attire . No matter what the dress is, a hindu woman is supposed to wear kumkum/ sindoor as long as her husband is alive. Modern women do not follow all that but in Jodha's time this was very much followed, actually this is the case in many parts of india even in these times.
Wiping your kumkum for any reason is considered ashubh.
Probably many people on this forum too, are not ware how much big deal it was !! :)
Anyways, its painful to see no one cares about perfection, this was just a small but imporatnat thing, could have avoided easily.
I know the disclaimer - " Ye serial kisi bhi vastavikata ka daava nahi karata "... This just shows the Cv's lack of desire to be even closer to reality.
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