subscription product causes price miscalculation

When a subscription product is added to the cart, the price shown in the tab is the price of the subscription item, regardless of what else is in the cart.

In other words, only the subscription item’s price is shown, and everything else gets overwritten.

Also, a negative number shows up in the quantity label beneath the price on the tab.

https://www.ads-software.com/plugins/woocommerce-cart-tab/