The site may rely on cookies or other browser storage to retain a session. Private browsing, automatic data clearing or restrictive site settings can remove that state. Repeated logout does not necessarily mean the streaming password is wrong or the subscription has expired.
Identify the browsing mode
A private window is designed to retain less local state after it closes. Some browsers also clear selected site data on exit. That behaviour can be intentional and useful on shared computers, even if it means signing in again.
Review only the relevant site settings
Use the browser’s controls for the trusted player address rather than allowing all tracking or disabling privacy protections globally. A site can also expire sessions on its own, which local cookie settings cannot override. Ask support about expected session duration if it is unclear.
Keep shared computers cautious
Do not save a streaming password on a public or borrowed computer just to avoid typing it again. Sign out when finished and close the browser. If the site repeatedly loops back to login while you are actively using it, record the browser version and visible message as a separate fault.