Weird Death message plus disconnecting problem

[Zico-Man]

my friends and I have a minecraft server we play on, and we have an issue is where if anyone dies everybody just disconnects and for whoever who doesn't disconnect a weird message replacing the death message with "" here is a video to demonstrate it.

https://www.youtube.com/watch?v=DbszvqWMwKg

I had another person on the server we both disconnected sorry if I didn't show it in the recording.

[LOOHP]

Which version of IC are you using and which version of Minecraft is your server on?
Also are there any errors in the console?

[Zico-Man]

the version is 4.3.4 and it happens to almost all versions when I tested it and no in the console it shows the death message normally.
Edit : just nothing else but that

[Zico-Man]

Just to mention I use aternos as my host idk if that is useful information but I'll put everything I have on the table

[LOOHP]

I just tested in Minecraft 1.21.10, and I wasn't kicked. I wasn't able to reproduce the issue.

[Zico-Man]

I just tested it on 1.21.10 it worked but on 1.19.4 (which is the server version) and 1.20.1 it didn't,
I'll just probably move the server up to that version.
But thanks!