PPB failing to serialize component placeholders

[onycius]

Hey, I'm using Velocitab 1.21.1 on the proxy in combination with a Fabric server backend. I'm trying to use the StyledNicknames mod's nickname placeholder in the tab list. It looks like using it in the footer and header works, but it doesn't work in the player list. Attached are my logs for both the proxy and backend: proxy: https://mclo.gs/ezvPAi6 backend: https://mclo.gs/5SyI9tX