🐛 Intermittent "Order not found" when proceeding to checkout

[VKronmar]

Describe the bug
When booking tickets from the public event page, the next step sometimes fails with the error message Order not found.

The issue appears to be timing-related. If ticket quantities are selected and Continue is clicked immediately, the error appears more often. If the user waits about 3 to 5 seconds after selecting ticket quantities before clicking Continue, the booking usually proceeds correctly.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://ticket.karspexet.se/event/6/gamla-spexare-vinland-eller-en-fruktad-evighet
2. Select 2 x Vuxen
3. Select 1 x Student
4. Do not use Guldbiljett
5. Click Continue immediately after changing the ticket quantities
6. See error Order not found

Expected behavior
After selecting ticket quantities and clicking Continue, the user should always proceed to the next booking/order step without errors, regardless of how quickly they click after changing the quantities.

Screenshots

Logs
No logs attached yet.

Desktop (please complete the following information):

• OS: Debian GNU/Linux 12 (bookworm)
• Browser: Brave (Chromium), Zen Browser (Firefox)
• Version: [not collected yet]

Hi.Events Version and platform
Please state the version of Hi.Events you are using and what platform it is hosted on. Local, Docker etc.

Hi.Events version: unknown, but the installation was updated this Thursday (2026-03-05)
Platform: Docker

Additional context
This does not happen every time. The error seems to happen roughly 50% of the time.

A colleague tested the same booking flow and noticed that the issue appears to depend on timing:

• If the user selects ticket quantities and clicks Continue immediately, Order not found appears more often
• If the user waits about 3 to 5 seconds before clicking Continue, the booking usually works

If the error occurs, going back to the event page and trying again a few times will often eventually succeed.

The site is hosted on Debian GNU/Linux 12 (bookworm) in Docker.
Host kernel: 6.1.0-40-amd64
Architecture: x86_64