Can someone help me solve this Lightning mystery?

Alice sent Bob $999 in sats from Blink to Phoenix.

Bob clicked receive & didn’t enter an amount.

Alice scanned Bob's QR code using the Blink app.

Alice’s txn shows as sent and the sats are deducted from her balance in Blink.

Bob has not received the payment 6 hrs later.

Bob has 8 million sats of inbound liquidity but has not sent or received a payment since Jan 2024.

What happened 😕