The bug just came up again, after I had been away from the computer for a few minutes with Obsidian open. I turned off custom CSS and plugins (dataview) while in this state and the bug persisted — also there were no new errors in the console. But, strangely enough, when I quit and then re-opened Obsidian, the custom CSS and plugins were back on again. (Also this time the entire note had been wiped.)
I don’t have the time right now to do a screen recording and retroactively blur out my personal information but it again wouldn’t allow me to open other notes — when I clicked on other notes in the file navigation list or in the quick switcher, they would not open. The only way I’ve been able to save my progress when this happens is copying the entire current note and pasting into the same note upon refresh.