Here are some steps to troubleshoot why emails are disappearing from your inbox:

1. Check Trash and Spam Folder: Check if the missing messages can be found in Trash or Spam folders.
2. Configure Scanner Software: If you are using any third-party software to scan emails, it might be interfering with your messages.
3. Check IMAP Settings: Check if your IMAP (Internet Message Access Protocol) settings are properly configured.
4. Check Account Settings: It is possible that a filter has been created in your account settings that is automatically deleting messages.