VPN disconnects when connecting a third-party RDP session --?

Question

VPN

There is a client server with Windows 10 and many users (all without administrator rights).
I connect to the server via RDP and connect to my VPN (Softether / Ubuntu / L2TP)
After that, if someone connects via RDP under a different user, my VPN is disabled.
Without error, on its own.
I sinned on my VPN, but then I checked on another free one. The result is the same.
Other client servers with Windows 7/10/2012 and multiple users have the same situation.
Since there are no administrator rights, I can only connect using Windows.

Added a video for clarity: https://youtu.be/hHSdV6jIU14
To simulate the situation, I installed a seven on a virtual machine, set a fix for several RDP connections, added two users (not admins) and connected to them from the host in turn, turning on VPN on the first before the second connection.

Answer 1

Desktop versions of Windows are single-user (Win10/8/7). When the second user connects, the first one must end his session. Session ended - all programs running in the session are also terminated.
There is no such restriction in server versions of Windows.

Answer 2

Do you have VPN inside RDP?
Does the RDP session close at the same time?

Answer 3

For WinXP, the termsrv patch was used at one time, which modified the DLL to allow multiple RDP connections. It seems that this also exists for new versions of Windows.