In 1.16.0 blazes were given "avoid_damage_blocks": true within the navigation.walk component. This makes them avoid blocks that cause fire damage even though they are immune to fire. It also differs from Java Edition (if the wiki is accurate).

Steps to reproduce

1. Make a long platform consisting of alternating 1-block-wide strips of solid blocks and magma/campfire/lit netherrack.
2. Spawn a blazes on each solid-block strip.
3. Wait.

Expected result

Blazes wander all around the platform.

Actual result

Blazes stay in their solid-block lanes.