screen misparses our hex colour output

[Proximyst]

What behaviour is expected:

The screen output to be correct, as in equal to that of running the server without any terminal multiplexer, as well as with tmux:

tmux

Purely alacritty with alacritty in $TERM

What behaviour is observed:

screen misinterprets the output somehow and breaks the output. This applies to both UTF-8 mode (-U option), as well as non-UTF mode (no -U).

Steps/models to reproduce:

Send a message with RGB colours to the console. The colours in the examples are #a2aeab and #ff681f. I used EssentialsX nicknames & chatted to get the colours into console.

Plugin list:

None are necessary, however for the sake of setting a good example:

Plugins (16): BlockLocker, ChatItemDisplay, Essentials, EssentialsSpawn, Gaea, grakkit*, LuckPerms, PlaceholderAPI, ProtocolLib, ProxiDebugPlugin, ServerUtils, spark, Stress, Terra, Vault, WorldEdit

Paper version:

[20:40:27 INFO]: This server is running Paper version git-Paper-498 (MC: 1.16.5) (Implementing API version 1.16.5-R0.1-SNAPSHOT)
[20:40:27 INFO]: Checking version, please wait...
[20:40:28 INFO]: Previous version: git-Paper-484 (MC: 1.16.5)
[20:40:28 INFO]: You are running the latest version

Anything else:

$ screen -v
Screen version 4.08.00 (GNU) 05-Feb-20
$ tmux -V
tmux 3.1c
$ alacritty -V
alacritty 0.7.1
$ zsh --version
zsh 5.8 (x86_64-unknown-linux-gnu)
$ java -version # Installed with SDKMAN!
openjdk version "15.0.2" 2021-01-19
OpenJDK Runtime Environment AdoptOpenJDK (build 15.0.2+7)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 15.0.2+7, mixed mode, sharing)
$ uname -r
5.10.13_1

This only applies to the console; the log file and ingame chat are both correct.

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This issue is rejected by the Paper team and is only present to let others know of the issue, such that someone else potentially PRs a workaround that must not affect the other correct cases.

[Owen1212055]

Can someone please see if this is still an issue with adventure's new hex color console logic?

[pop4959]

I can confirm that this is fixed now with the new Kyori ANSI text serializer.