I use Masonry with wide spacing. After updating to 5.4, the spacing is gone. You can see it on this page (among others).
Please check Yigit’s answer on this thread: https://kriesi.at/support/topic/enfold-5-4-no-space-between-images-in-masonry-gallery/#post-1395105
Hope it helps.
Will this be fixed in a future release?