Relationship between QueryObserver and queryCache.clear

[bulksup]

Hello,

I have a question regarding the relationship between QueryObserver and queryCache.clear() in React Query.
I created a new QueryObserver and subscribed to it using the subscribe method.

I then called queryCache.clear() to remove all cache.
After that, I updated the query data using setQueryData, but I noticed that the existing observer did not emit the new data.

So I created another new QueryObserver and subscribed again, which worked as expected.

However, I later found that the original observer (which had already been "removed") emitted the old cached data once the staleTime of 10 minutes passed.

Questions:

• Is it an expected behavior that an observer continues to emit data based on staleTime, even after queryCache.clear() is called?
• If this is intentional, does it mean we must manually unsubscribe existing observers before calling queryCache.clear() to avoid this?
• Am I missing something in my understanding of how queryCache.clear() interacts with observers?

Thanks in advance for the clarification!