New-UDTextBox -RowsMax not honouring value

Hiya,

I am using the code below but the -RowsMax value is not being honoured. Is this a bug or am I using it incorrectly ?

New-UDTextbox -Id 'txtExample2' -Label 'Feedback' -Placeholder 'Please enter your feedback' -Type 'text' -Multiline -Rows 10 -RowsMax 15 -Variant outlined 
Product: PowerShell Universal
Version: 4.1.2

Cheers