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Why does VPN authorization constantly reset on websites, forcing me to log in again?

THE SERVER REGULARLY ROTATES ITS OUTGOING IP ADDRESS POOL, OR A BRIEF SESSION DROP OCCURS.
Many services and forums tie active user sessions to a specific network address to protect against account hijacking. When the VPN tunnel dynamically changes the IP address, the system considers the login suspicious and forcefully clears session cookies.

Defensive Binding of Web Sessions to Network Addresses

To prevent cookie theft, websites verify the network address of every incoming click. If the secure connection provider uses dynamic load balancing between data center servers, the IP address changes right during your browsing session, causing the site's security script to log the user out.

How to Maintain Stable Authorization

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