[BUG] StateContainer - Constraints are not working properly

Is there an existing issue for this?

• I have searched the existing issues

Did you read the “Reporting a bug” section on Contributing file?

• I have read the “Reporting a bug” section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug

Current Behavior

I have found multiple bugs but I think they can be caused by the same issue: Layouts ignore set constraints when used inside of state container as a state.

Layout	Layout not inside of state container (working)	Layout inside of the container (not working)
Grid + Label
ScrollView
ItemView

But if set a specific height to that layout it shows up as:

These all seem like they originate from how the bounds of the sub-layouts are calculated if they are calculated at all.

Expected Behavior

Images with expected behavior are in the previous paragraph.

Steps To Reproduce

I included an application repository where you can try working and not working layouts.

1. We can just run without doing any edits why launches the app which is using a state container.
2. If we want to see working constraints we can uncomment the Working Constraints region.
3. If we want to see a working Scroll View we can uncomment the Working Scroll View region.
4. If we want to see a working refresh view we can uncomment the Working Refresh View region.

Link to public reproduction project repository

https://github.com/zZHorizonZz/MAUI-Bug-Report-App

Environment

- .NET MAUI CommunityToolkit: 5.0.0
- OS: Windows 10 Enterprise (OS build 19044.2604)
- .NET MAUI: 7.0

Anything else?

No response

[brminnick]

should we close the issue then?

Nah, the main part of this reported issue is how StateContainer handles LayoutOption constraints. I’ve verified that behavior exists, but I need to confirm whether it’s a MAUI bug or a Toolkit bug.

[sfinn-qci]

We are also experiencing this issue on a project. Specifically, we are attempting to have a list view appear spanning the full screen for a state that is not spanning to fill the space.