Another thing I noticed that tabs still show up as an empty key:
[custom_fields] => Array ( [blocks] => Array (  => Array ( [acf_fc_layout] => content_block  => [title] => This is the title [content] => This is the content [fixed_bg] => 1 ) ) )
Not sure if this has anything to do with it, since we are using multiple tabs… wp_cache_get sets the found to true, while the result is empty (api-field.php line 454)
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