Codespaces - Setting Sync does not work after addition of prompt syncing

[glektarssza]

Seems to have been triggered by the merge of #241123. Setting sync was working fine yesterday.

Does this issue occur when all extensions are disabled?: Yes

VSCode Version:

Version: 1.98.0-insider
Commit: f23861839fb21c44102dac215998647b4cd02840
Date: 2025-02-20T05:04:30.237Z
Browser: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

OS Version:

uname -a
> Linux codespaces-5883da 6.5.0-1025-azure #26~22.04.1-Ubuntu SMP Thu Jul 11 22:33:04 UTC 2024 x86_64 GNU/Linux
source /etc/os-release
echo $PRETTY_NAME
> Debian GNU/Linux 12 (bookworm)

Steps to Reproduce:

1. Open a GitHub Codespace
2. Sync settings
3. Observe everything breaks down

Video of bug occurring:

broken_codespace.mp4

Additional notes:

• There is a proxy between me and vscode-sync-insiders.trafficmanager.net that may be resulting in the HTTP 403 observed in the setting sync logs. Not sure and unclear how to test if this is the case.
• Turning of the syncing of prompts restores setting sync functionality.