Problems with images: title, description, alt

Hi there,

I have been working for over 2 years with Piemont theme but recently, problems arrived with the images.

I upload images and create the right alt, description and title information, but after a few days all this information disappears. Anyone faced the same problem?

Tried to update WP and the rest of plugins, but the problem still continues.

Hope you can help me. Regards,