Hi Min Thant Aung Aung
We have Already included the fix for the issue "When the width is set to “100%,” the “e-toast-full-width” class is not added to the toast container element the first time" with our package version “26.2.8”. Therefore, we recommend upgrading to our latest version to resolve the current issue.
Root cause
In the toast component, when we set the width to 100%, the "e-toast-full-width" class is not updated the first time but updates the second time. This occurs because the status change method executes before the "e-toast-full-width" class is added, which is the root cause of this issue.
Release notes: https://blazor.syncfusion.com/documentation/release-notes/26.2.8?type=all#bug-fixes-6
Sample: https://blazorplayground.syncfusion.com/rZhTNFhxKaFyghVH