Here are some possible actions to take when your email drafts are disappearing:

1. Check that autosave is enabled in your email client and settings.
2. Check whether your drafts are saved online or synced across other devices.
3. Check your drafts folder for older versions.
4. Check if your draft wasn't accidentally deleted.
5. Check whether your draft's automatically getting sent when its opened.
6. Check if you're running out of storage space.
7. Check your internet connection.
8. Check if it's an issue with the email server.