I had your html code in text widget area. I do not know why you talk about html blocks. It was not the html block, only html code wrote in text widget area. It was your’s basic theme set up for theme. Basel & Co. with social buttons. I was not mine, it was your basic set up for this theme.
I do not know why the upgrade has this wrong affect on this widget area.
Only if you see on widget area 1 in widgets section you will see the html code for this. I cannot do that because i would have to reupload site in basic settings.