We are using custom fields on a custom post type, we have 3000+ posts with 3 custom fields each. Now we can’t access the all posts page (single posts are fine). After a few seconds, it times out and shows a blank screen. Deactivating ACF solves this problem.
– Deactivating the field group on the custom post type.
– Increased the memory limit to 4gb.
– Hiding custom fields from screen options, bc blank screen can’t access. But since we tried deactivating the field group already maybe it wouldn’t make a difference.