Hey Tom,
I just stumbled upon this thread. Had the same problem when using a full width element for the first time.
I investigated a bit and I think this is causing it:
.no-sidebar .entry-content .alignfull {
max-width: 100vw;
width: auto;
}
max-width: 100vw;
If I understand correctly this sets the max-width to the width of the viewport and does not take the width of the scrollbar into account.
Isn’t there another way to handle the width? I guess many people run into this problem, when using full width elements.
Thanks