Repo page loads correctly for a moment, then breaks with gating error

Created by: Joelkw

This was brought up by a user who thought this was an issue with the chrome extension URL bar, but I think it's actually an issue with something happening on Sourcegraph (or both, still digging in with them) – https://www.loom.com/share/6daae4a61a744a6aae9adf97388d6a20

This also seems to happen on other repository pages, like sourcegraph/about: