Same issue here. I’m running a Flexible Content field within a nested Repeater Field. So that’s REPEATER -> REPEATER -> FLEXIBLE CONTENT.
The client kept adding content to the page, until eventually it just wouldn’t allow anymore and gave this fatal error.
Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 72 bytes) in /public_html/wp-includes/meta.php on line 575
Increasing the WP_MAX_MEMORY_LIMIT to 512M “fixes” the problem, but loading this admin page and updating it take a LONG time. I’m very concerned that increasing the WP_MAX_MEMORY_LIMIT is just a band-aid. Why would it be taking up so much memory? Is ACF just not designed for using it this way? I sure hope not…
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