Unecessary heavy loading?

[ehausen]

I was wondering what is going on when the loading indicator is spinning..

The Modal on 3 first elements pop up almost instantly, but then it takes several seconds to load the rest and when checking the network tab it seems, it is loading the whole Gutenberg editor assets again in the background, despite the editor of course already has been loaded.

Obviously the at least the first three blocks data and preview images exist because the pop up instantly... So how could I tweak the code to show all the patterns when opening the modal?