Top menue doesn’t stay highlighted?

When WordPress archive/categories content is requested and displayed: On the top menu, the active page tab doesn’t stay highlighted and users can not see where they are in the top menu.

Any suggestions on how to resolve this?
My web site is https://www.joshengelking.com
And the code that needs a tweak is:

<div id=”menu”>

<li class=”page_item active<?php if (is_home()) echo ‘ current_page_item’; ?>”>/”>Home
<?php wp_list_pages(‘title_li=’ ); ?>

</div>