Recently, the titles on tables started showing the icons of field types, making the line of the titles overcrowded and confused, like we can see on this picture:
I don’t think there’s a way to get rid of the icons but you can adjust the height of the headers of the columns, this should give it some space to breathe
A fix is on the way! We should be back to the original behavior where the column format icon only shows upon hover (or if there is an error) with the next production release next week.