Interesting. When I tried testing bar-based lyrics with the Big Lyrics window, they didn't work.
I wonder why? I'll have to have a closer look.
UPDATE
I just tried them again and now they are working. They definitely were not working a couple of days ago when I replied to this post because I tested them before replying.
ANOTHER UPDATE
It seems that display of the lyrics depends where the cursor is. This makes sense. I'm guessing that I had my cursor position at bar that did not contain lyrics.
For some reason, though, I'm getting extra chords showing.
The top image shows what happened after I entered the lyrics for bars 1 and 2, positioned the cursor in bar 3 and then opened the Big Lyrics Window.
The bottom shows what I saw if I closed the lyrics window, positioned the cursor in bar 1 and then re-opened the window.
Because I'm not sure why the extra chords are there when clearly they are not entered, I'll report this to the development team.