Mobile App and Web App not showing same records

Mobile App and Web App not showing same records

Steps to reproduce issue:
  1. User1 creates accounts, contacts and leads
  2. User1 transfers the accounts, contacts and leads to User2 due to promotion
  3. User2 then shares the accounts, contacts and leads to User3 as read-write +related records
  4. User2 creates new leads and shares them with User3
  5. User3 can only see the items shared by User2 IF User2 created them. If User1 created them they are not visible in the Mobile App. They are visible to User3 via a browser.