Hey Salesforce friends :),

I am having an issue with these 2 classes. In Sandbox I get 85% code coverage, but when I deploy it goes to 30%. There must be something wrong but I can't manage to find out the bug. Any idea on how I could improve it? Thank you very much.
 

global class CaseUpdateReminder1 implements Database.Batchable<Sobject> ,System.Schedulable{

    global Database.QueryLocator start(Database.BatchableContext bc) 
    
    {return Database.getQueryLocator([SELECT Id FROM Case WHERE Eligible_Case__c='Yes' AND Reminder_1_Period__c = TRUE]);
    }

    global void execute(Database.BatchableContext bc, List<Case> scope)
    
    {for (Case Cases : scope) 
            
            {
                Cases.Priority = 'High';
                Cases.Internal_Action_Needed__c = 'Send Email';
                Cases.Reminder_1_Field_Update_Done__c = TRUE;
                Cases.OwnerId = '00G3W000001LjOcUAK'          
                
            }
        update scope;
    }    

    global void finish(Database.BatchableContext bc){}    

    global void execute(SchedulableContext SC){
    Database.executeBatch(new CaseUpdateReminder1(), 50);
    }
    }

in the code above, "Reminder_1_Period__c" is a formula field, TRUE if CreatedDate=TODAY, which is why I put the CreatedDate in the Test.



And its Test class:

@isTest 

public class CaseUpdateReminder1_Test 
{
    static testMethod void testMethod1() 
    {
        List<Case> lstCase = new List<Case>();

            Case cas = new Case();
            
    cas.OwnerId = '0053W000001LxTEQA0';
    cas.RecordTypeId = '0123W000000L3JSQA0';
    cas.Priority = 'Medium';
    case.CreatedDate = date.parse('10/02/2022'), 
    cas.Reminder_1_Field_Update_Done__c = FALSE;
    cas.UID__c = 'Test12345';
      
            lstCase.add(cas);
        
        
        insert lstCase;
        
        Test.startTest();

            CaseUpdateReminder1 obj = new CaseUpdateReminder1();
            DataBase.executeBatch(obj); 
            
        Test.stopTest();
    }
}

Thank you very much and all the best :)