ComboBox focus/cursor issue

[kishubhatta]

1. Open https://codesandbox.io/s/carbon-components-svelte-combobox-jv8t2?file=/App.svelte
2. Mouse-click inside the ComboBox area so options dropdown shows up, select one from the first ComboBox.
3. Mouse-click inside the ComboBox area so options dropdown shows up, select one from the second ComboBox (notice how the focus is still with the first ComboBox with cursor blinking)
4. Try clicking Search box, this does not get the focus. You are not allowed to type in.

Workaround:

1. Click anywhere outside the Combo and Search box once, now the first ComboBox looses focus.
2. Click inside the Search box, now this is accepted and one can see the typed out keys.