Weechat rendering issue when connected via Mosh

[catharsis71]

Connection via Mosh (vertical line is rendered as X's):

Connection via SSH (no issue):

Connection via Eternal Terminal (no issue):

Client is Ubuntu WSL 22.04 on Windows 10, Mosh 1.3.2-2.1ubuntu1, Windows Terminal
Server is Ubuntu Server 22.04 (tested on both ARM64 and AMD64 servers), Mosh 1.3.2-2.1ubuntu1

using LC_ALL=C.UTF-8 on both sides

[catharsis71]

Testing further, problem goes away if using byobu, screen, or tmux but I'm not in the habit of using any of those

[catharsis71]

Testing further... issue only happens when I mosh to the server as a non-priv user and then sudo -i to switch to root and run Weechat

If I run Weechat as the non-priv user, or if I mosh to the server as root directly, the problem does not happen