Bug Report: FortiClient Console window disappears when many certificates are present

[yoshino]

I would like to report a bug I have encountered with FortiClient. Here are the details:

1. When I open the FortiClient Console, the window appears but often disappears within a few seconds.
2. If I create a VPN connection named 0000 with the Client Certificate set to None, the FortiClient Console remains open and does not disappear.
3. However, if I create a VPN connection with the Client Certificate set to any value other than None and select it from the dropdown list in the FortiClient Console, the console often disappears within a few seconds.

Additionally, I have checked the Windows Event Viewer, but there were no logs at the relevant times in either the Windows Logs\Application or System sections. I also set the Log Level to Debug in the FortiClient Console and exported the logs after reproducing the issue, but there were no logs at the relevant times.

Furthermore, I found that deleting certificates issued by DO_NOT_TRUST_FiddlerRoot in the certmgr.msc (Certificates - Current User > Personal > Certificates ) can decrease the likelihood of the crash. When I removed all such certificates (resulting 15 certificates in the dropdown list), the crashes have stopped occurring.

Versions:

• FortiClient VPN 7.2.4.0972
• Windows 10 Enterprise 22H2

[MZBZ]

This is being investigated as issue id 1127274

[yoshino]

The bug still exists. 

Sometimes, the console window opens successfully. The login page has username field etc, and the client certificate box too. One certificate is selected. However, the steps below results window disappear.

1. click ⓘ icon on top-right to navigate to other page

2. click home icon to navigate back to the login page

3. The login page doesn't have client certificate box. The window disappears after about a second.

OS: Windows 11 Enterprise 23H2

Installed RAM: 64GB

FortiClient VPN version 7.4.3.1790