a11y gatherer hangs on https://almanac.httparchive.org/en/2021/ecommerce

This results in a PROTOCOL_TIMEOUT:

```
node cli https://almanac.httparchive.org/en/2021/ecommerce --only-categories=accessibility
```

Did not happen in 10.0

I bisected to: https://github.com/GoogleChrome/lighthouse/issues/15216

cc @tunetheweb 
