Sync Issue

### Expected
The app should sync on every device it doesn't matter if it's on Markdown >Preview or Markdown > Edit.

### Observed

When I am on MARKDOWN > PREVIEW on the Android App, and on MARKDOWN>EDIT on my Windows App. The changes made on the Windows App don't sync with the Android App. When I go back to the Android App and make a change, it syncs with the desktop app, and every unsynced previous change on my desktop app disappears.

### Reproduced
1. Open a note on MARKDOWN > PREVIEW on the mobile app
2. Open the same note MARKDOWN>EDIT on the Desktop app
3. Stay on MARKDOWN>EDIT on Windows App, make changes to the note
4.Go back to the Android App. Now switch from PREVIEW> Edit, and make different changes from the one made on the windows app.

### Where did you see the bug
Windows App
- System Make: ACER
- System Model: ACER Aspire ES14
- OS: Windows
- OS version: Windows 10 pro
- Simplenote app version: Simplenote-win-2.5.0

Andriod App
- System Make: SAMSUNG
- System Model: Note9
- OS: Android
- OS version: Android 10
- Simplenote app version: Simplenote(Beta)

Reproduce the listed Android and Windows PREVIEW/EDIT sequence and verify whether desktop edits disappear after an Android edit. Start by tracing the Android app's note editing and synchronization flow; done means edits made in either client sync across devices without losing earlier unsynced changes.

Written by the indexing model from the issue text.