Right now you are using the wvrx-fullwidth class on the pre header container, but you did not give it any background color, so there is no color to extend.
But if you give a color to that container background you will have the same issue as before with it going over the wrapper.
So as I mentionned, brfore, to extend with a color instead of the whole container, you need to use the same custom CSS as before.
Remove the wvrx-fullwidth class, and add
.is-desktop #inject_preheader:before {
content: “”;
position: absolute;
top: 0;
bottom: 0;
left: -9999px;
right: 0;
border-left: 9999px solid #DAF268;
box-shadow: 9999px 0 0 #DAF268;
z-index:-1;
}