Hello,

The sticky header may be cloned – a predefined set of elements that are not editable and your custom header – you can choose which row to make cloned all or one or two or all three and all the elements that are added to the default header would remain on sticky.

Please remove all your customization related to the header both PHP and CSS and tell me what elements you want to have in default:
1st row:
2nd row:
3rd row:

You would better add them all and hide those you do not want to show with CSS. Our support does not cover fixing header customization. The header builder has a wider range of options to configure what you need without any customization.

Best Regards