it is how Qubes OS do updates check
It’s known and regularly confusing users
see
- Some users think that enabling updates over Tor in the installer will route all update checks over Tor · Issue #9406 · QubesOS/qubes-issues · GitHub
- Feature request: disabling all clearnet update checks during installation process
- Updates check over clearnet instead of sys-whonix and other strange decisions
- Update check without sys-whonix