Home page in default language doesn’t work

My website sinteredstone.it have the default language ITALIAN.
I created the second language for my website with polylang but when I go to https://www.sinteredstone.it I’m redirected to https://www.sinteredstone.it/en/.

I checked what page is define like ‘Homepage’ and I have two ‘Homepage’: italian and english.
In the italian settings there is my italian homepage and for the engligh I have the english homepage. All it’s look good but when I go to https://www.sinteredstone.it I’m redirected to https://www.sinteredstone.it/en/.

The page I need help with: [log in to see the link]