Contact lookup

Contact lookup

Hello

I created a custom Module in ZOHO CRM with a lookup field for Accounts and lookup field for a contact

On Mobile app it's like impossible to select the contact on the selected Account. In other words: you see ALL the contacts in the CRM and not just the contacts on the accounts, this makes it impossible to find the correct contact in a long search when there are contacts with same/similar names.

how can we improve this ?

Thanks