Hi,
I have the same problem with ACF 5.1.5 and WPML 3.1.8.4.
As pointed out by brian1037, I’d rather avoid to translate in more than 5 languages prices, dates and other numerical data or tables.
I used Option fields just to fill in these fields only once for the whole website.
But now I have all these fields empty in languages different from default.
Hope it could be fixed soon,
thanks
Davide