Hi keiraarts,
Thanks for the bug report, I’m looking into it. By overnight, do you mean sometime between Sept 17 and Sept 18?
To help me narrow this down, are you using client-side routing, ie using React Router? Does your app use the method described under ‘Using client-side routing’ here: https://help.shopify.com/en/api/embedded-apps/app-bridge/actions/navigation?
Iain