Describe the issue

With the search keymap enabled, selecting text that appears multiple times then pressing ctrl+d selects all occurrences of that text, even when EditorState.allowMultipleSelections.of(false) is provided as an extension.

Steps to reproduce:

1. Open the linked example
2. Select test
3. Press ctrl+d
4. Type replaced
5. Comment out drawSelection()
6. Re-run
7. Repeat steps 1-4

After step 4 (both times), both occurrences of test are replaced with replaced.

Browser and platform

Firefox 119.0, Ubuntu 23.10

Reproduction link

https://codemirror.net/try/?c=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