That sounds very frustrating!
I’m not an Obsidian expert, but your issue sounds like a different one - and potentially a more serious one - than the one I posted. It sounds like your issue is triggered by typing a character, whereas the issue I experience does not affect my ability to write.
I would suggest going through the recommended troubleshooting steps (disabling plugins and snippets, etc.) and reporting as a separate issue if you determine that a plugin is not responsible.