Lava pockets generate in icebergs

The bug

Lava pockets generate inside icebergs in frozen ocean biomes. They have recently been changed to be able to generate in ice or snow in mountains, but this has made them able to generate in ice spikes and icebergs.

To reproduce

Seed

129168754447196166

Coordinates

/tp -34 65 40

(Right next to spawn)

Expected behavior

Lava pockets should generate in mountains.

Observed behavior

Lava pockets are generating in frozen ocean and ice spikes.