Collection is not built when `React.Activity` is set to `visible` the first time

[ali-idrizi]

Provide a general summary of the issue here

I was trying out the new <React.Activity> and came across an issue with collections not rendering anything the first time the mode is set to visible from hidden. Here's a screen recording of the issue:

https://github.com/user-attachments/assets/425a99df-dff3-41fe-8108-ecc6d57a2f7d

Also tried with @react-aria/collections version 3.0.0-nightly-2485ffa1b-251111, and the issue is present.

🤔 Expected Behavior?

The collection should be correctly built when the mode is set to visible.

😯 Current Behavior

The first time the mode is set to visible nothing is rendered and the collection.size is 0.

💁 Possible Solution

No response

🔦 Context

No response

🖥️ Steps to Reproduce

Here's a super minimal reproduction https://codesandbox.io/p/devbox/zen-platform-tjfns7

Version

3.0.0

What browsers are you seeing the problem on?

Firefox, Chrome

If other, please specify.

No response

What operating system are you using?

N/A

🧢 Your Company/Team

No response

🕷 Tracking Issue

No response