Alchem
Max Mega Menu will pick up Residual Styling when used in the Alchem theme.
Step 1 – Remove Residual Styling
Copy the header-template/header-0.php and header-template/header-1.php file to your Child Theme.
In each file find the following (important: this line occurs twice in each file):
<nav class="site-nav" role="navigation">Replace with:
<nav class="site-nav-mmm" role="navigation">Step 2 – Hide duplicate mobile toggle button
Go to Appearance > Customize > Additional CSS and enter the following:
.site-nav-toggle {
display: none !important;
}Additional Notes
Alchem sticks the header/navigation by default, so you should not enable the sticky option in the Max Mega Menu settings.