The title says it all, see for example here:  or here the default Gutenberg demo post: 
But not only the “Image” and “Cover” blocks, for example the “Pullquote” block also causes this (see here: ).
So basically everything with the “alignfull” CSS class seems to be affected.
I already found a solution here in the forum: https://generatepress.com/forums/topic/gutenberg-cause-horizontal-scroll/
But as I really only use plain vanilla Gutenberg + GeneratePress, I thought I ask if you already have this issue on your radar and if this will be fixed in a future release (or maybe it is a problem with my specific site)?
By the way, I really love the Gutenberg + GeneratePress combo 🙂 Coming from the “multipurpose” X theme, it’s really amazing to see how much you can do with the lightweight GP theme/plugin! This will be my new basic framework for all new client projects 🙂
Thanks a lot and best regards,
GP Premium 1.7.8