How to delete the hidden txt from phone view

I found out when I view my website www.enmaze.com (built on squarespace) from the phone. There are text content "Welcome Dinner 18:00 Restaurant du Me Like .... " on the page. While when I view from my computer they don't exist. I think those are underneath an image as an image alt content or so, 

I tried to find those text content from the editing page of squarespace , can't find them either. Can someone tell me how to delete those message ? 

Thank you very much 

It is Text Block, however I guess you drag it overlap image, so you can't see in edit mode to remove it