Running WT portable as a different user on W11 24H2 completely freezes initiating users logon session

[PGomersall]

Windows Terminal version

1.21.2911.0
Happens also with previous versions both stable and preview but all portable.

Windows build number

10.0.26100.2033

Other Software

Default profile can be either Windows PowerShell or PowerShell

Steps to reproduce

Windows 11 24H2 fully patched and domain joined.
WT portable is in stalled to root of local drive e.g. C:\WT or D:\WT
Logon as a domain user
Start windowsterminal.exe > right-click > Run as a different user - account is in initiated with YubiKey smartcard logon.
Type a command e.g. get-adcomputer xxx123
Whole logon session for initiating users freezes and becomes unusable.
Sometime a remote logoff of frozen logon can be forced, and the computer returns to normal operation. User can log back on and work normally. Sometimes a hard reboot is needed.
We have verified this happens on several different computers and users.
This can happen after in place upgrade from 23H2 to 24H2 via Windows Update or with completely clean 24H2 install.
It does not happen on prior versions of the OS 23H2.
Running other applications as a different user does not provoke this behavior.
Next troubleshooting step will be to determine if it is related to just running as a different user or specifically to a different user using a smartcard.

Expected Behavior

WT works normally when run as another user and does not freeze the initiating account logon.

Actual Behavior

Whole logon session for initiating users freezes and becomes unusable.
Sometime a remote logoff of frozen logon can be forced, and the computer returns to normal operation. User can log back on and work normally. Sometimes a hard reboot is needed.

[PGomersall]

other notes.
The logon session is not completely dead. Mouse moves albeit slowly. Seems everything is delayed hugely. Sometimes Explorer crashes and does not restart.
This can happen with both a user sat at local desktop console or via a rdp session.

[PGomersall]

I can confirm that this seems to explicitly be related to run as a different user when smartcard is required for logon to the different user account.
Starting WT with run as a different user where account is normal logon (not smartcard) works.

[PGomersall]

Also I can replicate the exact issue on Windows Server 2025 26100 with last stable cumulative patch.

[carlos-zamora]

Thanks for filing. There's a possibility this is some weird XAML deadlock. We'll look into it further.

[PGomersall]

Carlos, Thanks for the update. Not really sure how to troubleshoot further as the whole initiating session just freezes. It is consistent on multiple different computers (all physical that we saw issues on) and different users, but all running W11 24H2 or WS 2025. Let me know if I can provide anything else to help. Pete Pete Gomersall

[aermak]

I get it when running the local installed version after elevating it as admin after a while. Mouse moves slowly, can't click on anything, CTRL+Shift+Esc doesn't bring up task manager so i have to hard reboot every time to get it going again.