Using the phone search method I'm seeing a problem when I try to find accounts...

This is the method:

{{api-domain}}/crm/v2/{{module-api-name}}/search?phone={{phone}}

With the phone="5555555555" and the module-api-name="Contacts" the search returns a number of matching records for the Zoho Trial data.  However, with the module-api-name="Accounts" the search returns a 204 No Content.  If I search for "555-555-5555" it DOES find the matching accounts.  Oddly searching Accounts with "555 555 5555" also returns the matching accounts.

So unless I'm confused it appears that the phone search handles accounts differently than contacts and leads?

Is this a defect?