When is data from a query with Suspense undefined?

[iway1]

Getting confused about the behavior of queries with Suspense turned on. I assumed that "data" is guaranteed to be defined with suspense, but I'm running into issues where data is undefined after invalidating queries, even though my logs tell me that the data is refetched before the error happens?

Anyone have any idea of what are the circumstances under which data will be undefined when suspense: true? Or maybe this is a bug? Doesn't make sense that my data would be refetched and then it would be undefined in the component and crash after the fetch.

[TkDodo]

Can you show this behaviour in a codesandbox reproduction? I would assume that data is also not undefined. That is, unless you have enabled: false for example.

Since you mention "after invalidating queries": my guess would be that for some reason, the API might not return what you expect, which will somehow make you return undefined from the queryFn. Is the query still in success state?