[BUG] Server crashes and weird behaviors with lot of denied chat messages and EventTimer

[my-name-is-samael]

Fill out general information
OS : Win11 Pro, RAM 32GB
Server Version: 3.4.1, also tested with 3.8.2

Describe the bug
I am experiencing issues when a lot of users are texting via in-game chat, server randomly restarts without any error nor warning (the last log line is the chat message).
I have a special config in my mod (I guess you know it well now 😅) and it denies every message with the return code 1 (in accordance to the documentation and the source code).

I did some testing spamming the chat with and without the message handler and event timer (I don't know C++ very well so I didn't look much further), and here are my observations:

	without MessageHandler	with MessageHandler
without EventTimer	Runs fine (all messages shown)	Runs fine (no message shown)
with EventTimer	Runs fine (all messages shown)	Crashes or becomes very slow (and few messages can be shown)

Basic scripts to reproduce:

-- ServerMessageReject.lua

DenyMessage = function()
    return 1
end
MP.RegisterEvent("onChatMessage", "DenyMessage")

function FastTick()
    --print("Fast tick") -- doesn't even need to be commented out to witness crash
end
MP.RegisterEvent("fastTick", "FastTick")
MP.CreateEventTimer("fastTick", 100)

Then with a connected client, you can enter this instruction in the game console:

for _=1,1000 do UI.chatSend(tostring(require "socket".gettime())) end

Expected behavior
In the best scenario, avoid crashes but an explanation of the reason would help too 😄

Additional informations
I know this client script is an extreme stress test, but I experience crashes with less than 5 players sending around 5 messages each within 30 secs with my heavy load mod 😅

[my-name-is-samael]

I found a small workaround if you experience it: the trick is to create a parallel mod to handle chat messages and redirect them to your main mod with a GlobalEvent (and eventually get the result as a Promise if you want to reject or allow the message conditionally => doc)
This way, chat and tick handlers do not interfere and overload the mod's allowed process (I guess)

Edit: I can confirm crashes occur with EventTimer and onConsoleInput denied with a string too (just like EventTimer and onChatMessage denied with a number)