The bug
If you lock your difficulty in then go into a different dimension the lock is undone. If you lock it in that dimension and go back to the original one. It will be undone again.
Code analysis
Code analysis by @unknown can be found in this comment.
Related issues
is duplicated by
MC-47686
difficulty lock associated with a world
MC-47759
Difficulty-Lock Unlocks
MC-52445
Entering The End Unlocks the Difficulty
MC-55324
Lock button becomes unlocked
MC-59722
Death in the Nether
MC-63267
Switch between worlds (overworld/nether) unlock difficulty.
MC-65319
Difficulty Lock
MC-71383
in single player the difficulty is unlocked when you change dimensions after you lock it in the previous dimension
MC-77385
Difficulty unlocks upon going into Nether/End
MC-79551
Minecraft 1.8.3 Difficulty glitch
MC-81112
Changing dimension unlocks world difficulty
MC-81861
Difficulty unlocks and sets itself to Easy every time I enter the Nether
MC-86626
if you lock difficulty, then go to the end, and back, the difficulty is unlocked
MC-92948
Difficulty unlocks when entering a portal.
MC-98025
Locking Difficulty
MC-105022
Changing Language Unlocks World Difficulty Visually
MC-112352
Changing dimension reset the lock difficulty button
MC-114058
Traveling to Nether via portal "unlocks" world difficulty
MC-119222
Difficulty keeps unlocking
Comments
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Ezekiel
Does switching dimensions, logging out of the world, then logging back in fix the visual issue?
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Oh yes it is just a visual glitch. Thank you for helping!
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Still an issue in 08a and 10c.
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Still in 14w11b
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Confirmed for 14w17a
MagboneD
I can confirm this is present in 1.8.1. It appears to be a gui-related issue. You can cycle the button to peaceful, but hostile mobs will not despawn.
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I'm having the same issue in 1.8.7. The difficulty is unlocked and reverted to Easy upon moving between dimensions.
Ubuntu 14.04 64-bit system with Intel HD integrated graphics card using Oracle 8 Java Runtime Environment
marcono1234
Please link to this comment in the description
The following is based on a decompiled version of Minecraft 1.9 using MCP 9.24 beta.
The reason for this is the same as for MC-679. When the player enters a different dimension a new WorldClient object is created an most of the data is copied from the previous WorldClient object. Whether or not the difficulty is locked is only send when the player joins a server (or loads a world). When he changes the dimension the method net.minecraft.client.network.NetHandlerPlayClient.handleRespawn(SPacketRespawn) does not set whether or not the difficulty is locked for the new WorldClient.
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Is it a visual glitch tho? I've been able to cycle my difficulty (Locked at hard from world gen) and it still gives the whole blurb about locking the difficulty when I click the button.
I haven't actually played on any other difficulty to see if there was a difference and I haven't cycled to peaceful (In fear some of my named hostile mobs would despawn)
Also, confirmed 1.9.4
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Confirmed for 1.13.1.
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update 1.12.2 still
boq
Also, only the button is reset; the difficulty is still locked.