Hey, thanks for the report. This is a known issue with Dev Containers on WSL.
First thing to check is which Dev Containers extension you have installed. Open the Extensions panel and search for remote-containers. You need anysphere.remote-containers, not ms-vscode-remote.remote-containers. If you have the Microsoft one installed, uninstall it and install the Anysphere one instead. This helped in a very similar case: Cursor hangs after container start when using Dev Containers (WSL).
If you already have the Anysphere extension, can you share the full Dev Containers logs?
- View > Output > select “Dev Containers” in the dropdown
The Result map: undefined error in the logs is a known issue the team is working on. Your report will help with prioritization.