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Hello, I've updated to blocks 1.6 on our test site and when on mobile there are big gaps between the gallery cells. Here is an example - hidden link - if you compress the browser so the site responds to mobile, and then scroll down to the gallery images you will see the big gaps. This is what it's meant to look like (this is with Blocks 1.5.3) - hidden link
I've tried clearing caches etc and I can't see any obvious changes in the CSS.
During further investigation, I found that this custom CSS code from WP Admin -> Appearance -> Customize -> Custom CSS, is responsible for the extra space/gaps: