If "initialStale" is setted or return true, 'isFetching' will be true and 'data' will be undefined when the key is changed

[TIS-OMiddle]

Describe the bug
The initialStale behavior is strange. When initialStale is false and query key is changed, isFetching will always be true, and data will always be undefined

To Reproduce
Steps to reproduce the behavior:

1. codesandbox: https://codesandbox.io/s/rq-initialstale-xg9u2?file=/src/index.js:444-456
2. Click 'add' button

Expected behavior
Not sure what it should be.
I think initialStale should not be called multiple times, and data should be an object.

Screenshots

Desktop (please complete the following information):

• OS: Mac
• Browser: Chrome
• Version: 84.0.4147.125

Additional context
Add any other context about the problem here.

[tannerlinsley]

Hmm, this indeed looks like a bug. Could be happening around here: https://github.com/tannerlinsley/react-query/blob/caa6522a72b3338b610b5e8c207b3b0d332c0784/src/core/queryObserver.ts#L204

[tannerlinsley]

@boschni any ideas here? I'm still a bit disconnected from this code lol