I have the Quantity Discounts Sales Booster enabled and configured with 6 intervals, the first of which is min quantity of 5, max quantity of 10, and a discount of 5%. The product in question is sold for $7.50. When I add 5x of the product to the cart, it is calculated correctly at $7.13. However, when I click the [-] button in the cart to go from 5x to 4x, the price remains at $7.13, whereas it should obviously change back to $7.50 since the condition for discount is no longer met (5-10). However, if I go down to 3x, the price correctly changes to $7.50, and when I go back up to 4x, the price is still correct @ $7.50. And when I go to 5x, it correctly recalculates at $7.13. If I manually enter the number 4 using the keyboard then hit Enter, it calculates correctly at $7.50. It is only wrong when I go from 5x to 4x using the [-] button. This does not happen with subsequent intervals; only the 1st interval.
I have tried clearing the cache, and I’ve tried a private window. I’ve tried multiple browsers on multiple devices (laptop and mobile).