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Stacked tridents with increased max_stack_size are duplicated when thrown and picked up

status: needs triage

version: 1.21.11Game version 1.21.11Game version 1.21.11

Status: Open.

Bug

#13390 In PaperMC/Paper;

· ColinNason opened on Dec 13, 2025

PlayerJoinEvent fires before Mojang "Code of Conduct" screen is acknowledged

resolution: awaiting responseAdditional information is required from the issue reporterAdditional information is required from the issue reporter

version: 1.21.10Game version 1.21.10Game version 1.21.10

Status: Open.

Bug

#13389 In PaperMC/Paper;

· DereC4 opened on Dec 12, 2025

NPE when accessing <code>CommandSourceStack#getLocation()</code>

status: acceptedDisputed bug is accepted as valid or Feature accepted as desired to be added.Disputed bug is accepted as valid or Feature accepted as desired to be added.

version: 1.21.11Game version 1.21.11Game version 1.21.11

Status: Open.

Bug

#13387 In PaperMC/Paper;

· TBlueF opened on Dec 11, 2025

Add addModifierIfAbsent and addTransientModifierIfAbsent to attribute instance class

status: needs triage

Status: Open.

Feature

#13382 In PaperMC/Paper;

· Clexus opened on Dec 9, 2025

Items moved to GUI don't drop on death

status: acceptedDisputed bug is accepted as valid or Feature accepted as desired to be added.Disputed bug is accepted as valid or Feature accepted as desired to be added.

version: 1.21.10Game version 1.21.10Game version 1.21.10

version: 1.21.11Game version 1.21.11Game version 1.21.11

Status: Open.

Bug

#13381 In PaperMC/Paper;

· sexnine opened on Dec 9, 2025

Configurable entity tracking ranges per entity type

scope: configuration

status: needs triage

Status: Open.

Feature

#13377 In PaperMC/Paper;

· Warriorrrr opened on Dec 7, 2025

Player#getTargetEntity returns null for 1.21.10 mannequin

status: needs triage

version: 1.21.10Game version 1.21.10Game version 1.21.10

Status: Open.

Bug

#13373 In PaperMC/Paper;

· einfachBlu opened on Dec 6, 2025

Patrol spawning start day config option overrides environment attribute timeline

status: acceptedDisputed bug is accepted as valid or Feature accepted as desired to be added.Disputed bug is accepted as valid or Feature accepted as desired to be added.

version: 1.21.11Game version 1.21.11Game version 1.21.11

Status: Open.

Bug

#13369 In PaperMC/Paper;

· jpenilla opened on Dec 4, 2025

InventoryClickEvent cancel not working on Crafter Block

status: needs triage

version: 1.21.10Game version 1.21.10Game version 1.21.10

Status: Open.

Bug

#13368 In PaperMC/Paper;

· SiSchu opened on Dec 4, 2025

AsyncPlayerConnectionConfigureEvent thread leak

scope: performance

status: acceptedDisputed bug is accepted as valid or Feature accepted as desired to be added.Disputed bug is accepted as valid or Feature accepted as desired to be added.

version: 1.21.10Game version 1.21.10Game version 1.21.10

Status: Open.

Bug

#13365 In PaperMC/Paper;

· KamikotoTkach opened on Dec 3, 2025

GeneratedStructures loosing their PDC sometimes

status: needs triage

version: 1.21.10Game version 1.21.10Game version 1.21.10

Status: Open.

Bug

#13358 In PaperMC/Paper;

· NickCloudAT opened on Dec 1, 2025

Instant ghast elevator doesn't work

status: needs triage

Status: Open.

Bug

#13355 In PaperMC/Paper;

· samrussell opened on Nov 30, 2025