Cannot connect account on Blacksky PDS (myatproto.social)

### Quick summary

After authorizing the account chikorita157. myatproto.social, and finishing the authorization, it goes to the blog's homepage and never finish the authorize process.

### Steps to reproduce

1. Type in AT Protocol handle
2. Authorize the account
3. Page redirects to blog's homepage, the authorization process never completes.

### Site owner impact

Between 20% and 60% of the total website/platform users

### Severity

Critical

### What other impact(s) does this issue have?

_No response_

### If a workaround is available, please outline it here.

_No response_

Start by reproducing the AT Protocol handle authorization flow with chikorita157.myatproto.social, following the listed redirect from authorization to the blog homepage. Trace where authorization completion is expected after the redirect; done means the account connection completes instead of returning to the homepage without finishing.

Written by the indexing model from the issue text.