Problem with menu width after recent update

For a couple of days the menu has not respected the fixed settings.
In the structure menus I have one layer with logo menu on the right of the items and a second layer with text.
The menu does not respect the dimensions fixed in the menu structure.
Can I force it with javascript code?

now
"<ul id="css3menu1" class="topmenu menu__list" style=" width:100%;">
i need
"<ul id="css3menu1" class="topmenu menu__list" style="/*! width:100% */">

TKS