Tab completion error

[Minecraft0122]

Stack trace

https://mclo.gs/MQUE9S1

Plugin and Datapack List

ℹ Server Plugins (15):
Bukkit Plugins:

• AnarchyExploitFixes, AntiopByChaLiuCore, AxGraves, BetterRTP, BetterTeams, ChatFilter, LuckPerms, Matrix, packetevents, Plan, PlayerViewDistanceController, SkinsRestorer, TAB, ViaBackwards, ViaVersion

Folia version

This server is running Folia version 1.21.8-6-ver/1.21.8@612d9bd (2025-09-30T14:11:15Z) (Implementing API version 1.21.8-R0.1-SNAPSHOT)
You are running the latest version

Other

Does this look like a tab completion issue?

[tech-6]

What were you entering into the chat bar when this occurred?

Secondly this is an offline mode server.

[Minecraft0122]

你当时在聊天栏输入什么？

其次，这是一个离线模式服务器。

I didn’t discover this issue myself, and the player who did doesn’t want to tell me how to reproduce it.

After I asked the AI, it told me this error happens when using the Tab key. So I changed the tab-spam-limit value (from 500 to 50), and then I noticed the problem got better (players can't crash the server instantly anymore; it now takes a few seconds or they might get kicked out).

As for the server, it's actually offline mode since most players in my area don't have MOJANG accounts.

[ocelotpotpie]

Closing this as unable to reproduce. If you can reproduce on 1.21.11, please re-open and provide reproduction steps.