Hi I have a stacked chart with a legend.
I've added some filters to the card and they are enabled as quick filters. However it doesn't the quick filters, even if I hide the legend.
Check the attached pic I just added to this. They moved the quick filter off the page a bit and you may be showing them, but just can't find them.
If they aren't in there, I'd edit the card and remove the field you are quick filtering and re-add it and re-enable QF. Sometimes that has worked for me.