Currently on 1.14.4 LuckPerms.

meta-formatting:
prefix:
format:
- "highest_on_track_staff"
- "highest_on_track_grade"
start-spacer: ""
middle-spacer: " "
end-spacer: ""

my highest group on staff track is owner, my highest group on grade track is senior, and yet it's only showing owner prefix. It should be showing [Owner] [Senior] speedgump for myself, and yet it's only showing [Owner] speedgump or [Senior] speedgump.

Can you post the section between ```?

Like this?

```
config here
More lines
```

It will look like this and keep spaces in front which is very important in your case.

  config here
    More lines