Dashboard dropdown only showing 5 values from dynamic query

The below input field only showing 5 values in dropdown and no auto complete box. I can see it try to show all fields initially and at the end of the search it just showing 5 values + default value and this is not the case all the time. Some times it is not showing anything other than default value.EnvironmentprodprodEnvironmentenv_nameindex=test_* appname=* | rename kubernetes.namespace_name as env_name | rex field=host "ab_bc-[^-]*-(?P[^-]*)-" | sort env_name | dedup env_name | stats count by env_name-24h@hnow There are 25 events from the above query and they are like this env_name count mlcd1 1 mlcd2 1 mlct1 1 mlct2 1 np1 1 np10 1 np11 1 np12 1 np13 1 np14 1 np15 1 np16 1 np17 1 np18 1 np19 1 np2 1 np20 1 np3 1 np4 1 np5 1 np6 1 np7 1 np8 1 np9 1 prod 1 I am only seeing top 5 values + prod in dropdown. What's wrong with this?