Hello,
I’m having the same issue. I’m using Woocommerce, so I need the relationship field to be able to filter by product’s sku. I used the hookes mentioned above by @pedrolima, the original hooks are from StackExchange: http://wordpress.stackexchange.com/questions/178574/acf-relationship-field-search-filtering/207853
Those hooks are working great (they can search in meta data as well as post title) but, as @pedrolima said, it causes to loop the first result again and again instead of showing the relevant results.
Before I used those hooks from Stackoverflow, I tried to use the filter @hube2 mentioned “acf-fields-relationship-query”, I added the meta query that I need to $args array but unfortunately it didn’t work as excepted… It showed no results for any search I typed.
Any help will be appreciated!
