Similar to 5f12bc94dc, the code must re-check PageIsAllVisible() after
buffer lock is re-acquired. Backpatching to the same version, 12.

Discussion: https://postgr.es/m/CAEP4nAw9jYQDKd_5Y+-s2E4YiUJq1vqiikFjYGpLShtp-K3gag@mail.gmail.com
Reported-by: Robins Tharakan
Reviewed-by: Robins Tharakan
Backpatch-through: 12