VPN disconnects by Screensaver or screen lock

Hi,

does anyone found a solution, to hold the VPN up and running when the screen is locked?

OS: MacOS Sequoia 15.4 and MacOS Sequoia 15.5

FortiClient: VPN 7.4.3.1761

I had to install the newest FortiClient VPN version after a firewall upgrade as the older versions running in some connection problems.

The older versions were stable and connected when the screen was locked. With the new version, the VPN disconnect each time the screen locks.

In fortitray.log it is good to see, a message is send to forticlient and immediately after the message, the ssl-vpn is disconnecting.

20250508 14:55:24.613 TZ=+0200 [FortiTray:DEBG] AppDelegate.swift:390 System is locked/sleep
20250508 14:55:24.620 TZ=+0200 [FortiTray:DEBG] AppDelegate.swift:404 System is going to sleep
20250508 14:55:24.646 TZ=+0200 [FortiTray:INFO] VpnManager.swift:2163 Check VPN Connect without Reauth
20250508 14:55:24.657 TZ=+0200 [FortiTray:DEBG] VpnManager.swift:2174 VPN Connection without reauthentication enabled, timeout: 60
20250508 14:55:24.676 TZ=+0200 [FortiTray:DEBG] VpnManager.swift:2189 VPN Information saved.
20250508 14:55:24.690 TZ=+0200 [FortiTray:DEBG] VpnManager.swift:1808 Stop current VPN

The network connection is still open and stable. During the screen is locked, I sent a ping without any lost.

Any ideas are welcome.

Jörg