I am not even sure where to ask this, but I am at the end of my wits trying to identify the source of an error.

My app users are receiving error "Routing deadline expired"

I am also seeing this error logged in Sentry, but there is no useful information associated with it (e.g. no stack trace, which is unusual for Sentry – all other errors have it).

There is no mention of this anywhere in my codebase, and I cannot find mentions of this error in node_modules, i.e. I don't understand where it originates from. I even tried downloading every script in the bundle and looking for similar errors – nothing.

Even more bizarrely, I cannot find any references of this error happening to others when searching Google. I also tried searching GitHub, but there are no references to this error.

The only useful piece of information I have is that the error is caught by React error boundary. So we know it originates from some script within that context.

My Stack is Remix + Vite + React.

I also use Sentry and PostHog for monitoring.

I've sent support requests to different vendors, but figured I have little to lose by posting here too.