On Home custom link with class active by defalt

Hi,
I create a menu with 1 custom link for Home and 2 dropdown custom link menu.
The problem is that in Home the 2 dorpdown custom link have by default the class”current-menu-item current_page_item active”.
If i go in other page like products or in history the menu is ok.
Site: https://www.decoderelectronics.com
May you help to found a method to solve this issue?
Thanks
Matteo Andreatta
P.s.: I looked in internet and in the forum but i have only see something near what I need not the solution.