Newbie question: disappearing text

Things I have tried

What I’m trying to do

Hi! I have been using obsidian for several months with few problems. It is synced to my dropbox on both laptop and computer. Recently, every time I enter text it disappears in a few seconds.

Initially I received a notification saying 'text was modified externally". The notifications have stopped and the text does not stay in the note. After a quick google I found the suggestion to look at the debugging info which is here:

SYSTEM INFO:
Obsidian version: v1.0.3
Installer version: v1.0.3
Operating system: Darwin Kernel Version 21.6.0: Sat Jun 18 17:07:28 PDT 2022; root:xnu-8020.140.41~1/RELEASE_ARM64_T8110 21.6.0
Login status: not logged in
Insider build toggle: off
Live preview: on
Legacy editor: off
Base theme: dark
Community theme: none
Snippets enabled: 0
Restricted mode: off
Plugins installed: 0
Plugins enabled: 0

RECOMMENDATIONS:
none

I re-installed the software and the problem persisted.

I am looking for any suggestions as to how to troubleshoot this. Prior to this issue, obsidian has been an amazing tool for my research. I would hate to lose it and don’t have the skills to troubleshoot it on my own.

All help is appreciated!
Thank you!