Subscription discount doesn't show up in cart on some browsers

Hi,

I am using Seal subscription. The subscription details show up great on the product page. But when I add them to my cart some browsers such as Firefox and Incognito mode on Chrome so show the discounted subscription price (see picture below) but other browsers such as Microsoft Edge and Chrome do not show the discounted price anymore. Please can you help me fix this? As I want all the main browsers to pull in the correct discount on the cart page.

Thanks.