Kroger- Stacking Digital Deal & Manufacturer Coupon

I feel like I have read that you can stack digital deals (5x) with manufacturer coupons, but I am struggling to do so. Here’s the scenario, which may still be live at your affiliate.

Buy 2 L’Oreal Elvive Shampoo/Conditioner Digital Deal @ $2.99 each = $5.98 Manufacturer coupon $3/2 = $2.98 for both

At the register, only one item will discount down to the $2.99 price. The manufacturer coupon does come off. It appears that it will not stack a store coupon with a manufacturer coupon. Any insight? Thanks!