Searchable Select: press Enter does not always select/toggle the focused item

### Provide a general summary of the issue here

https://stackblitz.com/edit/rac-searchable-select-enter-issue?file=src%2FSelect.tsx

Open a searchable select, type `33` (or any two digits) quickly, and then press Enter. Repeat those steps.

Scree Record

https://github.com/user-attachments/assets/e3d3a93f-3122-46c8-9aee-a152d87aa006

### 🤔 Expected Behavior?

Enter should always select(single)/toggle(multiple) the focused item.

### 😯 Current Behavior

Enter does nothing.

### 💁 Possible Solution

_No response_

### 🔦 Context

_No response_

### 🖥️ Steps to Reproduce

https://stackblitz.com/edit/rac-searchable-select-enter-issue?file=src%2FSelect.tsx

### Version

1.12.2/3.0.0-nightly-df85b152a-250928

### What browsers are you seeing the problem on?

Chrome

### If other, please specify.

_No response_

### What operating system are you using?

macOS

### 🧢 Your Company/Team

_No response_

### 🕷 Tracking Issue

_No response_

Start with the linked StackBlitz reproduction and its src/Select.tsx entry point; reproduce the failure by typing two digits quickly and pressing Enter repeatedly. Trace the searchable select's focused-item keyboard handling and compare single-select selection with multiple-select toggling. Done means Enter consistently selects or toggles the focused item in Chrome.

Written by the indexing model from the issue text.