I suspect that you are typing the lyrics the whole way across the text area in the lyric editor.
I might be wrong with what you are doing. but if you are doing that then you will get messed up lyrics for some reason.
i find it best to do 2 , 3 , or 4 words per line in the editor then of course that depends on the number of letters in the words. but any more then a third of the way across the line in the lyric editor text area is too far.
your words might in fact be showing on your computer but at the pixel location that is too far off the right or left of the screen to be seen.
in the text editor there is two lines of instructions and the second line starts
with the following words.
syllables with the /
the limit i am talking about is to the letter " H " in the word " with " you might get a few more letters perline but no farther then the " / " in those words before you need to switch to the next line.
at least that is where the limit is for me.
