I followed all the steps to make my mob grinder and the tutorial was in 1.15 (Mine was too), he said it can be done in all versions of Minecraft, I even double-checked it. I'm sure I had lit all of the caves in a 148 block radius. The inside of the grinder was completely dark. The roof was very well lit. No matter what I had done, it still didn't work. Here's the tutorial:

  • I'll be very thankful and happy if you can help! Feb 2, 2020 at 14:23
  • 1
    It would be helpful if you would show us what you've build yourself, what are the steps you followed exactly, and what goes wrong exactly.
    – Joachim
    Feb 2, 2020 at 16:17
  • I followed all the steps correctly and didn't messed up. Thanks for the tip! Feb 3, 2020 at 11:04
  • I'm sure you did mess up, it's just not sure how. Most likely you built it like in the tutorial, on ground level, except in a normal survival world, not superflat. As result, mobs in caves fill up the mob cap and your spawner produces nothing. And the author of the tutorial should be shot for not mentioning it, and promoting this antiquated design (dating back to Alpha) that is an endless source of woe for all new Minecraft players because even when it works, it works very poorly.
    – SF.
    Feb 3, 2020 at 12:28
  • You're right, but I'm sure I had lit all of the caves in a 148 blocks radius. Thanks for your tip! I aprreciate it! Feb 3, 2020 at 13:23

1 Answer 1


You probably did nothing wrong. There is a known bug/behavior since May 2017 that mobs do not despawn as they should in bedrock edition (https://bugs.mojang.com/browse/MCPE-21856).

Today (17 March 2020) it was reported that mob farms are working. On that note, it would be really helpful if someone could link to a savefile with mob farms built so more people (myself included) could readily test and confirm that this issue is finally resolved without having to build a test world from scratch.

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