Gutenberg insert image "full width" not 100% width

[thetwopct]

I've noticed that when inserting an image via Gutenberg and then selecting its alignment as "full width" the image doesn't stretch all the way across the page:

I've been trying to work out why, seems to be something to do with max-width of the wp-block-image

.wp-block-image { max-width: 100%; }

[saltnpixels]

Gutenberg keeps updating and changing things. They add css sometimes that messes things up!
I have made a fix for this as well as some other fixes.
Thanks for reporting this!!