i have connection problem

I have confirmed that ...

[ ] Arclight is up to date
[X] all dependencies are installed
[X] all plugins and mods are up to date
[X] unable to reproduce in Spigot
[X] unable to reproduce in Forge

Arclight version

arclight-forge-1.16.5-1.0.25.jar

OS & Java versions

not working at console, but im using java 11 & debian linux

Plugins and Mods

Plugins (36): LuckPerms, VoidGen, FirstJoinPlus, SafeLoad, PlaceholderAPI, EventsManager, Votifier, LoneLibs, ProtocolLib, ChatReaction, NoPlugins, Tebex, CommandCooldown, Vault, MyCommand, WorldEdit, PlayerKits, HeadDatabase, HolographicDisplays, LiteBans, WorldGuard, Multiverse-Core, FinalEconomy, Citizens, TAB, SuperbVote, GriefPrevention, CrazyCrates, Essentials, Logger, EverNifeCore, ItemsAdder, PixelmonEconomyBridge, Plan, EssentialsChat, EssentialsSpawn

EventsManager its our custom plugin

Mod List: 
• minecraft forge-1.16.5-36.2.39-server.jar : minecraft (1.16.5) - 1
• mods_folder PixelmonOverlay-Forge-1.0.1-1.16.5.jar : pixelmonoverlay (1.0.1) - 1
• mods_folder spark-1.9.1-forge.jar : spark (1.9.1) - 1
• mods_folder BetterDexRewards-Forge-3.4.1-1.16.5.jar : betterdexrewards (3.4.1) - 1
• mods_folder balllogics-Forge-1.7.9.jar : balllogics (1.7.9) - 1
• mods_folder BetterPokeBroadcaster-Forge-2.0.0-1.16.5.jar : betterpokebroadcaster (2.0.0) - 1
• mods_folder journeymap-1.16.5-5.8.5p7.jar : journeymap (5.8.5p7) - 1
• mods_folder ForgePlaceholderAPI-Forge-2.0.4-1.16.5.jar : forgeplaceholderapi (2.0.4) - 1
• arclight server.jar : arclight (1.16.5-1.0.25-7cf92be3) - 1
• maven_libs forge-1.16.5-36.2.39-universal.jar : forge (36.2.39) - 1
• mods_folder EvoFix-Forge-1.0.0-1.16.5.jar : evofix (1.0.0) - 1
• mods_folder TrainerCommands-1.16.5-2.6.1.jar : trainercommands (1.16.5-2.6.1) - 1
• mods_folder Pixelmon-1.16.5-9.1.11-universal.jar : pixelmon (9.1.11) - 4
• mods_folder Atlantis-1.16.5-6.6.1-universal-all.jar : atlantis (6.6.1) - 1
• mods_folder AquaLures-1.16.5-2.2.1-universal.jar : aqualures (2.2.1) - 1
• mods_folder AquaShards-1.16.5-2.2.1-universal.jar : aquashards (2.2.1) - 1
• mods_folder AquaGTS-1.16.5-8.5.1-universal.jar : aquagts (8.5.1) - 1
• mods_folder MegaEvolve-1.16.5-1.5.1-universal.jar : megaevolve (1.5.1) - 1
• mods_folder AquaDailies-1.16.5-3.3.1-universal.jar : aquadailies (3.3.1) - 1
• mods_folder AquaPatch-1.16.5-9.1.11b-universal.jar : aquapatch (9.1.11b) - 1
• mods_folder TextureTokens-1.16.5-2.1.1-universal.jar : texturetokens (2.1.1) - 1
• mods_folder AquaAuras-1.16.5-4.2.1-universal.jar : aquaauras (4.2.1) - 1
• mods_folder pixelmagics-1.30.11.jar : pixelmagics (1.30.11) - 1
• mods_folder AquaGyms-1.16.5-3.4.3-universal.jar : aquagyms (3.4.3) - 1
• mods_folder AquaPlaytime-1.16.5-2.2.1-universal.jar : aquaplaytime (2.2.1) - 1
• mods_folder AquaSkills-1.16.5-4.7.2-universal.jar : aquaskills (4.7.2) - 1

Description

we have so much connection problems (timeout) when players connecting in the server/switching world/moving quickly. when players doing it his ping getting up and timeout them/the ping getting down slolwy. we have players who cant start play because the timeout problem (the server instantly kick them and timeout them) we dont have problem in our hosting because on other servers in our dedicated server all works fine and not lost the connection.

console lost connection shows: {player_name} lost connection: Timed out

Step to reproduce

i have no clue what to do to fix that timeouts crashes

Logs

https://api.mclo.gs/1/raw/kmBeWM4

the ubuntu not work well for me sorry, but this is the log

Server pack link (Optional)

No response

IzzelAliz / Arclight