Meta Key disappears after reload

[ahmedatnjimedia]

i have an acf field name "expert_id", when i tried to setup AQL to display all posts that have the "expert_id" meta key and the value "2958", the meta key seems to disappear after refreshing the page or perhaps it is not getting saved to begin with.

[ryanwelcher]

Can you be sure to hit enter or the comma key after typing the meta key? This is a common issue with this kind of field