I also tested toggling panels with sidebar and note list stacked right of the note. Hiding those panels after changing the width of the column doesn't resize the editing window (as seen in this Github issue). Attempting this multiple times resulted in a fatal error.
I'd suggest keeping the sidebar and note list left of the note until these issues get resolved.
Anything paneled to the right is oddly managed by Joplin. The several plugins that use it … I never use because Joplin doesn't scale the viewports sanely IMHO when right-panels are in play.