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:

2025-11-12.09-48-03.mp4

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

[snowystinger]

Thanks for reporting this, I've opened a draft PR which can reproduce the issue in a test.
#9176

[nwidynski]

@snowystinger Gut feeling is probably the style implementation of ElementNode not having been adjusted for Activity also applying display: none, causing it to think we are in a suspended render.

[snowystinger]

thanks @nwidynski , unfortunately, the code path doesn't appear to go through either the getter or setter. We do go through setProps above after hidden->visible, and when we do the node isConnected=true and isHidden=false.

It seems more like something is happening where the cloned collection is old maybe? I haven't determined a good way to verify what's going on and my knowledge of how Activity is implemented is not the best yet