Why isSucces turning into true while status "pending"

I try to fetching a query using RTK method POST and I console the response like below:
useEffect(() => { console.log(responseCheckPromoCode.isError, responseCheckPromoCode.isSuccess, responseCheckPromoCode.status); } ,[responseCheckPromoCode]

after running the project responseCheckPromoCode rendered 3 times like below:

any answer and suggestions would be appreciated, Thanks.