[MC-193936] The tops of stairs above nether fortress wart rooms can generate obstructed

Seems pretty unintentional to me, and not fun from a gameplay standpoint. The game seems to not generate extra air here like it does with corridors.

Linked issues

Hi there!

I can confirm for release 1.16.2.

Can confirm for 20w46a.

Can confirm in 20w51a.

Can confirm in 21w03a.

Can confirm in 21w05b.

Can confirm in 1.16.5 and 21w08b.

Can confirm in 1.19.

[media]

Version: 1.19

Seed: 3032665062407875672
Coordinates: /execute in minecraft:the_nether run tp @s 98663.27 62.97 -680.81 108.27 -15.76

Can confirm in 1.21.3 with the seed/coords provided by Avoma.