[MC-213772] Certain faces of azalea are not culled by other blocks

To reproduce, place blocks against these faces and enter spectator mode - they still are rendered despite not being legitimately visible.

Related issues

migrated 2021-02-03T18:20:12Z

[media][media]

migrated 2021-02-03T18:43:28Z

Can confirm.
Relates to MC-213777

Avoma 2021-02-05T16:30:57Z

Can confirm in 21w05b.

Avoma 2021-02-11T17:08:11Z

Can confirm in 21w06a.

Avoma 2021-02-20T12:52:40Z

Can confirm in 21w07a.

Avoma 2021-02-26T14:25:22Z

Can confirm in 21w08b.

Avoma 2021-03-20T14:24:26Z

Can confirm in 21w11a. Video attached.