i get xaml binding failure with validation

[hboran]

this failure only show when user input any value to textbox

AdornedElementPlaceholder, Name='adornedElementPlaceholder' AdornedElement.(0)[0].ErrorContent TextBlock.Text String Failed to get value. ArgumentOutOfRangeException:'System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values. (Parameter 'index')'

[asine]

i get the same error on .net 9.0.2.
#1705 test