Cannot access internet despite UI showing successful connection

[jamesWalker55]

Is it a bug?

• I know this is an issue with the app, and contacting Mullvad support is not relevant.

I have checked if others have reported this already

• I have checked the issue tracker to see if others have reported similar issues.

Current Behavior

On version 2025.2, when I connect to a server on Mullvad, the UI shows that it has connected successfully:

However, when I try to access any website, it fails to connect at all:

On version 2024.8, it connects successfully using the same settings, and I am able to visit websites as usual:

Through some experimentation, I notice that this only occurs when the VPN is using the UDP protocol. When I use "UDP-over-TCP" obfuscation, I can connect to the internet once again.

Expected Behavior

I should be able to access the internet.

Steps to Reproduce

1. Launch the Mullvad app
2. Ensure the "UDP-over-TCP" obfuscation is NOT used (use any other UDP-based connection method)
3. Connect to any server
4. The connection succeeds on the Mullvad UI
5. Cannot connect to internet on any other app

Failure Logs

mullvad-report.log

Operating system version

Windows 10

Mullvad VPN app version

Broke in 2025.2, worked fine in 2024.8

Additional Information

No response