Many Adobe programs are very sensitive to fonts, and PS is one of them (Titler in Premiere is even more sensitive).
I would suspect that there is a problem with the font. It might be corrupt (though working in Word seems to rule against that), or it might just be a font, that PS does not display properly, due to how it's written.
Are you having any other issues with particular fonts?
Can you find that font from another foundry, or perhaps one that is very similar?
I have seen issues with font displays in PS (and Titler), with the some of the Isabelle, and Isabella family.
Good luck, and maybe someone else knows that font, and will have suggestions for you.