Zendesk Support Users search API doesnot return search query on realtime

Hi Zendesk Team, 

 i have encountered some unusual search issues with zendesk support users api . i have following url

url = "https://subdomain.zendesk.com/api/v2/users/search.json?async=true&query=%2B124******"

which search a users having phone +124******, which i have created recently, upon hitting this url i got empty response but after sometime i got the correct response. I have even tried with adding and removing async=true parameter, is there anything i have missed to include in url?

is there any solution to get this response on time?

Thank you.