I’m curious if information from this site has helped anyone with Object Cache and ACF?
https://support.pagely.com/hc/en-us/articles/115002105112-Advanced-Custom-Fields-Pro-and-Object-Cache-Compatibility
From their site:
Problem
The Advanced Custom Fields plugin disables persistent caching, as shown in the following function on line 30…
wp_cache_add_non_persistent_groups(‘acf’);
While using an Object Cache boosts performance for your site, using this plugin with it enabled can cause inconsistencies and unexpected behavior. See more information about this issue here.
Solution
If not using the plugin isn’t an option you can attempt to use the redis-cache plugin workaround.