Avoid creating redundant containers

### Please fill out the following:
- **i3 PR:** https://github.com/i3/i3/pull/5469

- **Description:**
  - With https://github.com/i3/i3/commit/f8befe378ab3c9f8d035657ca0247c9b8c242b6b, WM should not create this insanity by an accident:
 
  ![redundant](https://github.com/swaywm/sway/assets/300146/eb1bf9d3-609f-4ec8-b199-4a3fb994b031)
