User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-25999669-20201117191606/@comment-1038387-20201121113528

If it appears okay to you, that'd be down to the resolution issue Bomb Bloke mentioned. I'm on Desktop XL, and with its breaking point, a gallery with images of 120px has four images per row on the published page, but three in preview.