It took longer because they submitted a new app where reviewers have no means of signing in.
It says on DHH’s blog. We can’t know for sure unless he shares a screenshot of it but more or less that is the reason because I was rejected with this same reason before.
>Of course we gave them a login. We’ve been publishing apps on the App Store for over a decade. This was not a low-level mistake. It went all the way to the app review board.
In another response he writes that the reviewers did in fact log in.