So there are these very efficient farms that you can use in 1.14/1.15 that I built in tallcraft survival but when I used it it did not work how it was supposed to work . At first I thought it was just patched in 1.15 so I hoped onto a single player world to test out and it worked just fine. I came up with a reason why this could happen it is probably because of the many bug fixes/patches paper spigot has.
here is a copy of my file is you want to see it.
# This is the main configuration file for Paper. # As you can see, there's tons to configure. Some options may impact gameplay, so use # with caution, and make sure you know what each option does before configuring. enable-player-collisions: true save-empty-scoreboard-teams: false bungee-online-mode: true save-player-data: true incoming-packet-spam-threshold: 300 region-file-cache-size: 256 use-alternative-luck-formula: false suggest-player-names-when-null-tab-completions: true load-permissions-yml-before-plugins: true velocity-support: enabled: false online-mode: false secret: '' book-size: page-max: 2560 total-multiplier: 0.98 spam-limiter: tab-spam-increment: 1 tab-spam-limit: 500 async-chunks: enable: true load-threads: -1 watchdog: early-warning-every: 5000 early-warning-delay: 10000 timings: enabled: true verbose: true server-name-privacy: false hidden-config-entries: - database - settings.bungeecord-addresses history-interval: 300 history-length: 3600 server-name: Unknown Server messages: no-permission: '&cI''m sorry, but you do not have permission to perform this command. Please contact the server administrators if you believe that this is in error.' kick: authentication-servers-down: '' connection-throttle: Connection throttled! Please wait before reconnecting. flying-player: Flying is not enabled on this server flying-vehicle: Flying is not enabled on this server world-settings: default: keep-spawn-loaded: true keep-spawn-loaded-range: 10 disable-ice-and-snow: false count-all-mobs-for-spawning: false skeleton-horse-thunder-spawn-chance: 0.01 armor-stands-do-collision-entity-lookups: true disable-thunder: false auto-save-interval: -1 falling-block-height-nerf: 0 tnt-entity-height-nerf: 0 remove-corrupt-tile-entities: false experience-merge-max-value: -1 grass-spread-tick-rate: 1 bed-search-radius: 1 fix-zero-tick-instant-grow-farms: false use-faster-eigencraft-redstone: false water-over-lava-flow-speed: 5 parrots-are-unaffected-by-player-movement: false container-update-tick-rate: 1 non-player-arrow-despawn-rate: -1 creative-arrow-despawn-rate: -1 prevent-tnt-from-moving-in-water: false allow-non-player-entities-on-scoreboards: false nether-ceiling-void-damage-height: 0 portal-search-radius: 128 portal-create-radius: 16 disable-explosion-knockback: false seed-based-feature-search: true armor-stands-tick: true entities-target-with-follow-range: false spawner-nerfed-mobs-should-jump: false baby-zombie-movement-modifier: 0.5 allow-leashing-undead-horse: false all-chunks-are-slime-chunks: false mob-spawner-tick-rate: 1 disable-teleportation-suffocation-check: false per-player-mob-spawns: false fixed-chunk-inhabited-time: -1 prevent-moving-into-unloaded-chunks: false max-auto-save-chunks-per-tick: 24 optimize-explosions: false enable-treasure-maps: true treasure-maps-return-already-discovered: false use-vanilla-world-scoreboard-name-coloring: false max-entity-collisions: 8 duplicate-uuid-resolver: saferegen duplicate-uuid-saferegen-delete-range: 32 filter-nbt-data-from-spawn-eggs-and-related: true disable-creeper-lingering-effect: false anti-xray: enabled: true engine-mode: 1 chunk-edge-mode: 2 max-chunk-section-index: 3 update-radius: 2 hidden-blocks: - gold_ore - iron_ore - coal_ore - lapis_ore - mossy_cobblestone - obsidian - chest - diamond_ore - redstone_ore - clay - emerald_ore - ender_chest replacement-blocks: - stone - oak_planks frosted-ice: enabled: true delay: min: 20 max: 40 fishing-time-range: MinimumTicks: 100 MaximumTicks: 600 despawn-ranges: soft: 32 hard: 128 game-mechanics: disable-pillager-patrols: false disable-sprint-interruption-on-attack: false disable-relative-projectile-velocity: false disable-chest-cat-detection: false disable-player-crits: false disable-end-credits: false shield-blocking-delay: 5 disable-unloaded-chunk-enderpearl-exploit: true scan-for-legacy-ender-dragon: true generator-settings: flat-bedrock: false squid-spawn-height: maximum: 0.0 lightning-strike-distance-limit: sound: -1 impact-sound: -1 flash: -1 max-growth-height: cactus: 3 reeds: 3 alt-item-despawn-rate: enabled: false items: COBBLESTONE: 300 hopper: cooldown-when-full: true disable-move-event: false lootables: auto-replenish: false restrict-player-reloot: true reset-seed-on-fill: true max-refills: -1 refresh-min: 12h refresh-max: 2d
First of all, thanks for spending the time researching this! I can confirm that it is caused by the configuration option you mentioned.
In my opinion these 0 tick farms, while they work in singleplayer, should not be possible on servers. They’re an exploit and basically produce free items. Free items have a negative impact on the servers economy.
Thank you for your time I see how 0 tick farms could negatively impact the server.