TWebCssClass error

I tried to use a TWebCssClass in my project for set margin-left and margin-right to Auto for a panel.
If I set these property in TWebCssClass.Margin-Left(or Right).Type (in ObjectInspector or in code) to stAuto (or AtPercent), I have an exception: "Identifier Expected" during compilation.
Please try yourself.
Ps. :TWebCssClass in a big step, like FNC responsive component!

Thanks for your feedback.
We could reproduce & identify this. We're working on a fix.