Static Page problems

Hello,
I’m using storefront with a child theme.
Everything was working perfectly since 1 month ago, but yesterday, I don’t know why, I had a problem with the home page.
I’m using q-translate for a multi-language site (italian-english) and the home page in the english version display a static page as I want, the italian home page doesn’t anymore and it display post page.
I tried to check if “reading setting” on my dashboard was ok and everything should be as 1 week ago , i did many times appearance>customize>static front page and I saved it again but it switch again immediately when I browse for my website again even if it shows me the correct layout on the customization page.
How can I love this issue?
Thankyou