Bad url when navigating to fetchData url in react template (.net core 3.0 preview 3)

[Amine-Smahi]

Bad url when navigating to fetchData url in react template (.net core 3.0 preview 3)

Shown url : https://localhost:5001/authentication/login?returnUrl=https://localhost:5001/fetch-data

Screenshot

[marquesm91]

Fix in #8592