Web bridge not redirecting for newly updated zonefile

Hey! I have `hank.btc.us` setup to redirect to `https://twitter.com/heynky`. You can see my zonefile [here](https://api.hiro.so/v1/names/hank.btc). I have a `_redirect` URI record setup. When I visit https://hank.btc.us, I get an error page, though I expected it to redirect for me.

I didn't add that record through btc.us, so I'm open to the possibility that my zonefile is setup incorrectly. If that's the case, let me know. Otherwise, I'm wondering if the web bridge is "out of date" or not seeing new records (my zonefile was just updated ~2 days ago).

Start by reproducing the redirect failure at https://hank.btc.us and inspect the linked zonefile and web bridge handling for the `_redirect` URI record. Determine whether the zonefile is invalid or the bridge is stale, then verify that a valid updated record redirects to the configured Twitter URL.

Written by the indexing model from the issue text.