Paid off store card, Credit score Lowered

I have outstanding balances on about 7 credit cards, 2 of which can be easily paid off, and a 3rd that I use for Uber delivery services but if not used for that, also could be paid off. The others wills take some time, but one of the store cards was paid off entirely, yet my FICO score went down.

I won't be using this card for a while even though I get discounts with it, but I totally forgot why credit scores lower, when you pay off the balance on a card. Seems really backward to be punished for paying off a credit card.