Problem with Collection Widget in Thingworx 8.4.0

Hi,

I am using Thingworx 8.4 and i am facing problem in Collection widget ..
In my case Child mashup has a value display which is of same size as that of mashup (Value display Size=Mashup Size) and Mashup Color= purple. 

I have created new Mashup in which i have used Collection Widget and in its  property i have given MashupHeight=Child MashupHeight, MashupWidth=Child Mashupwidth .The size of value display in child Mashup (Value display Size=Mashup Size) is not behaving accordingly in Collection widget

The above thing works fine in Thingworx 8.3.4