Several drafts are being created while writing an email.

[thundernest-bot]

Describe the bug

Thundermail in Thunderbird will create multiple drafts instead of updating a single draft file.

To Reproduce

Steps to reproduce the behavior:

1. Go to Thunderbird > Settings
2. Click on Auto Save
3. Set Auto Save to 1 minute
4. Draft an email, taking at least 3-4 minutes

Expected behavior

One draft email saved

Actual behavior

Multiple drafts of the same email saved

Screenshots

System

• OS: Ubuntu 24.04
• TB Version: 140.11.1

Additional context

gz#6282