Hello Everyone,

I have a situation where i'm using the email-to-case. The scenerio is : 
1. If i use email-to -case then i'm not able to fetch the attachments from Case object
query --> SELECT CaseNumber, (Select Name from Attachments) from Case
This doesn't return any attachment.
2. If i use custom apex class :- inboundemailhandler class, I'm receiving the attachments from email and also able to fetch the attachments using the same query mentioned above..

Code --> global class GetEmailToSalesForce implements Messaging.InboundEmailHandler {   
    global Messaging.InboundEmailResult handleInboundEmail(Messaging.InboundEmail email, Messaging.Inboundenvelope envelope) {    
        Messaging.InboundEmailResult result = new Messaging.InboundEmailresult();
        Case newCase = new Case();
        newCase.SuppliedName = email.plainTextBody;
        newCase.SuppliedEmail = envelope.fromAddress;
        newCase.Subject = email.subject;
        newCase.Status = 'New';
        newCase.Origin = 'Email';
        try{
        insert newCase;
            System.debug('New Case is  created:'+newCase.Id);
        }catch(Exception e){
            system.debug('Got an exception:'+e);
        }
        if (email.binaryAttachments != null && email.binaryAttachments.size() > 0) {
            for (integer i = 0 ; i < email.binaryAttachments.size() ; i++) {
                Attachment attachment = new Attachment();
                //attachment.ParentId = contact.Id;
                attachment.ParentId = newCase.Id;
                attachment.Name = email.binaryAttachments[i].filename;
                attachment.Body = email.binaryAttachments[i].body;
                insert attachment;
            }
        }
        
        return result;
    }
}

Can someone please let me know the reason.

Thanks.