A test payment went through clean. Card accepted, Stripe's dashboard showed the subscription sitting there active, green tick, nothing wrong anywhere in sight. I refreshed the app expecting to see the account flip over to the paid plan.
It didn't. Still showing as free.
That's an unsettling kind of bug, because normally when something breaks, something complains about it. This had none of that. Stripe showed a successful payment, and I couldn't see an error on my side. The notification I'd built to keep the account up to date appeared to have worked. The result in the app said otherwise.
I went back through what I'd built, checking the payment information against what my code expected. I'd mistaken a successfully received payment notification for a successfully updated account. Those were two different things, and I'd only confirmed the first.
I corrected how I processed it, then checked the result in the app. This time the test account showed the paid plan, which was the thing I'd wanted to confirm in the first place.
What stuck with me was less the fix itself and more the reminder that "no error" isn't the same thing as "it worked." Some bugs shout. This one just smiled, said everything was fine, and left me looking at a free account with a successful test payment beside it.
