Amazon lowered my price by 37%

Just saw an order for 4 units of Xmas cookies but AM lowered the price by 37%. I did not set a business price or offer quantity discounts. When I click on “see other sellers” 1/2 of them are also lowered form 10-37% and mine shows the correct price. When I click to ship the order it sold at the lower price.

Is this a promotion? Nothing on my end to indicate that. These are Merchant filled and obviously I don’t want to be selling at this ridiculous price.

10 plus years here and never seen this, open a case I guess. The forums gave no results.