Mobs no longer see buttons as full blocks and thus won't walk off edges.

Please don't mark it "Resolved" so quickly. Jay requested an original bug report on the breaking of Mob Farms: https://twitter.com/Mega_Spud/status/1303087436004823046

Reopened 🙂

Thanks, Urielsalis.

I really feel like this is similar to the recent changes to collision boxes for pressure plates that broke certain farms and were reverted. MCPE-80276

I think it is important to discuss if any of the improvements to pathfinding have unintended consequences that should be addressed or not. This is a mechanic that has been in the game for a very, very long time and well established mob farm designs are impacted by it. It is smart for the developers to consider the impact before finalizing the change. If needed, we can post lots of tutorials and let's plays from YouTube that use this mechanic.

Also, I want to make clear that I am specifically talking about buttons here. The other blocks that were updated in connection with buttons are not used in pathfinding-based farms as far as I know.

You can resolve this ticket and the related button pathfinding issues by let mobs only pathfind across buttons placed on the sides of blocks. This will not affect how mobs interact with buttons place on the top or bottom of blocks.

There is precedence for what Reed suggests in the comment just above, in the fix for MCPE-81316. That issue was fixed by changing the effect of collisionless blocks on a boat when placed on top of the ice the boat travels on, without changing the effect of those blocks on a boat when they are placed on the side of the ice that a boat travels on. So now blocks like buttons and torches are handled differently when in the same block as a boat than they are when in the block below. Doing the same for buttons and pathfinding could fix the issue reported here while preserving the fixes to MCPE-47075 and MCPE-44575.

See

for what I mean.

Happening again. All of my mob farms that use buttons on the side of blocks so mobs will pathfind across them stopped working after the latest hotfix.

PS4

This is still an issue for me in 1.16.200 on Windows 10 edition. I used this design: https://www.youtube.com/watch?v=9G2hpEVuXXM

Is this going to be fixed or do I need to rebuild my creeper farm that I spent weeks building (from build height to bedrock)?

I think this is a parity change. Don't open trapdoors work the same?

Affects 1.17.40.20

This is a bug not a feature just use coral fans they reverted the change they made that made mobs don't treat coral fans as full blocks.

This was fixed with the fix for MCPE-153897.