StackedHeaderRows behave strangely when using FrozenColumnCount

[Ben Green]

Without frozen columns, stacked rows work as expected

But if I set frozen columns to 2, the last few columns are not stacked properly

See attached example.

Attachment: SFDemo__Copy_82d0c970.zip

[Sweatha Bharathi]

Hi Ben Green,

We have checked the reported issue “When using FrozenColumnCount , the last stacked columns are not spanned properly during horizontal scrolling" on our end, and it is confirmed as a defect. And We have logged a bug. We will fix this issue and include it in our NuGet release Which is scheduled on September 30, 2025.

You can track the status of this report through the following feedback link,

 

Feedback Link: When using FrozenColumnCount , the last stacked columns are not spanned properly during horizontal scrolling in WPF | Feedback Portal

Note: The provided feedback link is private, and you need to log in to view this feedback.

 

We will let you know once it is released. We appreciate your patience until then.

Disclaimer: Inclusion of this solution in the weekly release may change due to other factors including but not limited to QA checks and works reprioritization.

Regards,

Sweatha B

[Sweatha Bharathi]

Ben Green,

We would like to let you know that Essential Studio Weekly NuGet packages v31.1.20 has been published in nuget.org with the fix for the issue "When using FrozenColumnCount , the last stacked columns are not spanned properly during horizontal scrolling". Please let us know if you have any concerns in this. 

Root Cause Details:

The issue occurred because child column names weren’t properly split before validation against grid mapping names, preventing exact matches and causing incorrect stacked column rendering.