Hello,
I'm encountering what I believe is a very similar issue to this thread, but I can't seem to get the applicable part of the solution to work in my context.
I have some large hero copy in a narrow container with a hyphenated word that SplitText is unable to break apart. From what I'm reading in the linked thread, this is happening because the one "word" cannot be split into multiple divs, so I need to swap in a non-breaking dash character in for the regular one, but I'm not having luck pulling that part out into my demo.
Attached a couple of screenshots in case the hyphenated word is not rendering at the same spot on your end in the Codepen example.