Page never loads with Nostr Bunker auth

One scenario of this infinite loading screen is caused by logging in with Bunker auth. I know why it happens. What I don't know is why it doesn't always happen.

SoapboxLoad waits until the Soapbox signer is connected and subscribed before continuing forward. When using an external signer, this restriction doesn't exist. But Soapbox doesn't know whether you're using an external signer or its own signer. So it waits for the signer subscription to be started, but there's no keys to sign with.