Server responds with Internal server error for Lead search API call

Hello,

Since today we are having problems with: https://www.zoho.com/crm/developer/docs/api/search-records.html API call.

When a Lead exists on CRM we regularly get {"code":"INTERNAL_ERROR","details":{},"message":"Internal Server Error","status":"error"}.

Example:

* Lead exists on CRM call:

curl "https://sandbox.zohoapis.com/crm/v2/leads/search?criteria=((Email:equals:mailexists%40mail.com))" \
-X GET \
-H "Authorization: Zoho-oauthtoken sometoken"
{"code":"INTERNAL_ERROR","details":{},"message":"Internal Server Error","status":"error"}

* Lead does not exist on Zoho call:

 curl "https://sandbox.zohoapis.com/crm/v2/leads/search?criteria=((Email:equals:mailnotexists%40mail.com))" \
-X GET \
-H "Authorization: Zoho-oauthtoken sometoken"

No errors returned back.

We have not made any changes to code related to this and it worked until today. Same behavior is on sandbox and production.

Can you please look into this issue further?