Cannot refresh access token: "qt.networkauth.oauth2: Cannot refresh access token. Refresh Access Token is already in progress"

User is using QOAuth2AuthorizationCodeFlow object to connect via oAuth2 to spotify and they are not able to refresh the token when it is expired.

When they get grant they save the refreshtoken(in savedTokenRefresh variable)
and then before each api call do:

spotify.setRefreshToken(savedTokenRefresh); // spotify : QOAuth2AuthorizationCodeFlow spotify.refreshAccessToken();

And in the application output it shows:
[qt.networkauth.oauth2] Cannot refresh access token. Refresh Access Token is
already in progress.

Example project attached.