If Stripe can't charge your card, it retries automatically, and Split Hero keeps recognizing your existing subscription while it does.
When a payment attempt fails, Stripe moves the subscription into a retry state, such as past due, incomplete or unpaid, and keeps trying the charge over the following days. Split Hero still recognizes you as a subscriber during this window.
Opening Billing from your account settings takes you straight to the Stripe billing portal, where you can update your card details or check the subscription status. You won't see the plan selection screen again while a retry is in progress.
Starting a new subscription while Stripe is still retrying the old one would create two active subscriptions and double billing. Split Hero routes you to the billing portal instead, so you only ever have one subscription.
Update your card in the billing portal as soon as you can. Once Stripe successfully charges the updated card, your subscription returns to its normal active state.