Mobile menu possible introduced bug

Whilst rolling out some updates for my client i noticed the mobile menu wasn’t looking right. Im not sure when this issues was introduced but the site was tested and this issue wasn’t there prior to launch. (couple of months ago)

As you can see from the screenshots the mobile menu’s do not span the width of the screen anymore even though in the designer the nav-menu is set to 100%.

The weird thing is if you change the values in the source code in the inspector to 100% instead of the px value (which i have no idea where this come from given that im not using px values in the designer) it fixes it.

Anyone else notice anything?


Here is my site Read-Only: LINK
(how to share your site Read-Only link)