RadioButton text not rendered in RBGroup

Hi All,

I have created a demo SAPUI5 application in Web IDE. It operates well in the App. Preview. When I deploy it to the Gateway and start from the FLP the Radiobutton's texts disappear. I use sap.m.RadioButtonGroup with buttons aggregation. If I use the RadioButtons with groupName property (and without RadioButtonGroup) the texts are displayed well. I wonder whether it is the speciality of the fiori sandbox rendering or something else.

Thanks for your help in advance.

BR,

Peter