I updated to X 6.3.6 and my Blog page no longer works on the Integrity Light child theme. Individual post pages are fine. If you check out https://www.absolutelycorporate.com.au/blog/ you can tell that the content is all there (in 3-column layout) as you can hover in each location and see the link to the posts, but the images and text don’t appear.
It could be related to WPBakery, but I have enabled the Legacy X feature and no change. Have also cleared all the cache and even tried deactivating my WP Cache plugin.