Last emWin binary release available on NXP website is v6.16c. Unfortunately this version is affected from a bug on TEXT widget that was fixed only with v6.18c (see here).
ok, I will check NXP emWin web page regularly. Anyway, please push your team or boss or whoever you want to release a new emWin release, becuse the last available (6.16c) is bugged and the error is very annoying.