custom post type single adding "full-width-content" class to single body

I can't seem to figure out why the generate press is adding "full-width-content" to my single page body class on of my custom post type.

For clarity, I do like the full width and no sidebar, but I wanted to add containers to my content rows with "grid-container container". On my homepage this works, however because of the full-width-container class, generate press removes the max-width of my content with this selector:

.full-width-content .container.grid-container {
    max-width: 100%;
}