Hi Sky,
thank you for your help;
I tried to deactivated plugins but the effect didn’t change.
Then I thought to check if maybe the WPBakery page builder can affect…
I tried to create new text box from scratch and insert again the shortcode and now it’s fine.
It can be someone has play with style in the pagerbuilder box. Sorry for didn’t check before.
Thank you very much for your support. Resolved!