The `Due to technical difficulties...` banner persists across reloads.

[nathan-at-least]

I submitted a request (see #219) which failed and returned the following banner on https://leastauthority.com/submit-subscription as follows:

Due to technical difficulties unrelated to your card details, we were unable to charge your account. Our engineers have been notified and will contact you with an update shortly.

As I proceeded to test new backend pages, that banner is still present, even though I pasted the URL into a new tab (versus hitting "reload").