1.21.2 / 1.21.3 Tracking issue

Priority tasks (new, the other list will also have some of those):

• Verify per player mob spawning behavior, especially this change (either it was broken for multiple versions or it is broken now): https://github.com/PaperMC/Paper/commit/3cb16c9d91eb133a9d95605bdb8afc6ed40d6ee9#diff-950deb69c365ce9e698f6f455f174056fc72d2958391fa9bd1ae49e7e029124fL155
• Fix TeleportFlags mapping
• https://github.com/PaperMC/Paper/pull/10675 / https://github.com/PaperMC/Paper/pull/11631
• spark async-profiler update
• https://github.com/PaperMC/Paper/pull/11606
• https://github.com/PaperMC/Paper/pull/11599

• Check on "Fix entity teleportation and cancel velocity if teleported" since new tp param has delta movement. (patch got removed)
• PlayerItemCooldownEvent adoption to cooldown groups (it exposes Material) https://github.com/PaperMC/Paper/pull/11625
• Upstreams (and ours) ItemDamageEvent called for 0 damage https://github.com/PaperMC/Paper/pull/11900
• Check in on PlayerTeleportEndGatewayEvent (might need dimension == targetDimension)
• Fix tripwire disarming not working as intended - do we want this to be configurable still? also this diff is different than ours
• https://github.com/PaperMC/Paper/pull/11605
• https://github.com/PaperMC/Paper/pull/11532
• MCUTILS: look at chunkmap changes around line 555. I removed our changes because I wasn't sure what changed, needs to be looked at!
• timings v2: random line somewhere in serverchunkcache near tick. doesn't matter mutch, entirety of timings needs to be removed
• Check in on EntityZapEvent implementation, heavy overload usage in Mob#convertTo
• Check in on EndermanAttackPlayerEvent - the event may be called in the freeze goal check, sounds unsmart.
• The entirety of PlayerLaunchProjectileEvent needs review (specifically trident pickup status) see 7c04a31c9. Should work, but check
• Check on net.minecraft.world.level.material.FlowingFluid#getSpread no longer using a spread cache for initial block state lookup
• Check removed config options.
• w.i.ench.effects.DamageItem > ChangeItemDamage
• Check on Fix Mojang Bugs patch (last good revision was 1dc142534d54bd1ae01060948bd1caad572a9724)
• https://github.com/PaperMC/Paper/pull/11547
• Check on shear api (both shear and drops in event) Also maybe new API to define the used tool?
• Check Fix possible StackOverflowError for some dispenses for equipables
• Check on resending effects sus stew cancel (no more send active effects? in CB)
• Rework of map init event fix patch as cache now contains optional
• remove timings
• Check in on CraftFurnace cook speed multiple / recipe
• SpawnerEntry$Equipment - LootTable now cannot be null, looks like the entire equipment just needs to be set to null?
• Check GameRule array backed with game rule now feature flagged
• Remove method with resendRecipes param CraftServer#removeRecipe? Currently always has to resend due to index shifts
• configuration option to disable ender pearl chunk loading behaviour #11524
• https://github.com/PaperMC/Paper/pull/11611
• Investigate calling server tick events during sleep
• add flag to check if the server is sleeping
• https://github.com/PaperMC/Paper/pull/11546
• Tag lifecycleevents might need some rather agressive changes as registry.FREEZE is now after post flatten. Resolution is going to be a rename to freeze as the event becomes a "called after all vanilla elements are added". Deprecate freeze for removal, remove in next version.
• https://github.com/PaperMC/Paper/pull/11606

This is a release tracking issue with several completed items and broad unchecked reviews, including PlayerLaunchProjectileEvent, FlowingFluid#getSpread, map initialization, CraftFurnace cooking, SpawnerEntry$Equipment, CraftServer#removeRecipe, and server tick events during sleep. Start by choosing one unchecked item and reading its named entry point and related upstream changes; done means resolving that item and updating its checklist status.