Fullwidth page template hero block width issue

[arraypress]

When using the fullwidth page template and adding a CoBlocks "Hero Block", there is a padding issue that occurs as follows (you'll see from the image size that it's not stretching fully):

This is with the page header disabled (for obvious reasons!).

You can see the width is not 100%, it's set to width: 98vw;. It's also worth noting a top padding exists that looks better removed:

.site-content {
    padding-top: 2em;
}

I set this to 0 and it looks better with the hero block in place.