Updated steps to reproduce in comment.
The Better Together Update / 1.2.0.2 patch notes say:
"- Mobs will now avoid cacti, fire, and lava"
But they don't seem to avoid fire at all.
Avoiding lava seems to work perfectly for most mobs, except slimes. Slimes literally jump in lava.
How to reproduce:
Put a very simple fire maze/wall around a villager or a zombie for example
Most of the time they will just walk through the fire
Linked issues
Comments 15
FWIW, in 1.5.2 I see slimes jump right into very large bodies of lava all the time. It's not like there's a lava square and the slimes are so big they can't avoid it. They just hop right into a lava lake flowing lava pool (not lava source blocks) lava lake* and go poof.
*Upon further inspection, it was all lava source blocks. The correction has been corrected.
Cleaning up old tickets: This ticket has not been updated recently (~1 year+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines.
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Can reproduce.
Have a villager or zombie near lava with nowhere else to go. Instead of staying still, like they would do with any other threat, they jump straight into lava. IF it does not happen, repeat a few more times, or wait 10 minutes.
I can still reproduce this issue (only for fire) in 1.17.40.21 Beta quite easily by spawning a zombie and a villager on opposite sides of a fire block in between, with space around the fire. The zombie still goes straight through the fire instead of pathing around it.
kmb: not all mobs are supposed to avoid damaging blocks. Zombies and sheep, for example, are notoriously heedless in real life.
If you still think there is a residual bug here, please make a new ticket so that we can track something precise. Note that a couple of related issues are already reported: MCPE-142054, MCPE-138191.
Mobs seem to be cutting corners when pathfinding, so they are still getting caught on fire (1.17.40.23, no experimental modes)
Also happens in iOS 1.5.0. Not only do the villagers walk through the fire, once they start burning they seem attracted to the fire and just circle around in it until they croak.