undercurl lsp diagnostics not displayed on helix running through zellij

[orhanbalci]

Newest helix editor supports undercurls to show lsp diagnostic messages. When run standalone these undercurls are displayed properly on my setup. But when I open helix in zellij undercurls disappear.

zellij --version : zellij 0.34.4
stty size: 14 118
alacritty --version: alacritty 0.12.0 (5a728195)
helix --version: helix 23.03
uname -av: Linux karahisar 6.1.22-1-MANJARO #1 SMP PREEMPT_DYNAMIC Fri Mar 31 07:11:32 UTC 2023 x86_64 GNU/Linux

This is helix run directly from terminal:

This is helix run on zellij

[imsnif]

Hey, thanks for the detailed bug report but this is a duplicate of #1594
There's an open (and unfortunately currently abandoned) PR for this here: #2018