@scholarInTraining suggested a fix above. Is that what you tried? What did you try?
Close Obsidian and backup a copy first:
If you just go into your vault/.obsidian and delete “workspace” and “workspaces.json” it should reset the layout of your vault. You’d then have to rebuild your layout.
Or if you’re brave (close Obsidian and backup a copy first) you can try to edit the JSON and see if you can just delete the extra search panes.