Naturally generated lava can set fire to lush caves.
How to reproduce
World type: Single Biome; Lush Caves
Seed: -8508883206669806165
Coordinates: /execute in minecraft:overworld run tp @s -18.45 -35.95 253.58 -3417.38 44.48
Linked issues
Attachments
Comments 4
Can confirm in 1.17.1 Release Candidate 1.
Caves & Cliffs 1.17.1 Release Candidate Datapack Preview
World Type: Single Biome, Lush Caves
Seed: -5683955929687229745
Coordinates: /execute in minecraft:overworld run tp @s -1683.64 -50.42 -6765.10 142.68 15.57
Can confirm in 21w11a.