I was asked to log in to a meeting when I started a browser with zak

When I start a meeting with my browser, I am redirected to the login page although my meeting link has already carried the user's zak credentials.

My link to start a meeting: https://zoom.us/wc/84780184238/start?zak=eyJ0eXAiOiJK..........

My zak is from: https://api.zoom.us/v2/users/***********/token?type=zak

Strangely enough, some users can start the meeting directly with this meeting link, but some others have to login first before joining the meeting successfully with the same meeting link.