ros3d.js - placing new object on viewer scene changes reference coordinate axes

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Hello,

I'm utilizing ros3d.js for visualization of turtlebot. and additionally, i intend to spawn 3d objects on top of the urdf map plane. And the map has coordinate axes displayed for reference purposes as shown below.

http://robotwebtools.org/images/demos...

But, whenever I do spawn an object (say a cube), the coordinate axes turns from an arrow to a cube (red-blue-green group). I've attached the resultant snapshot below.

https://i.imgur.com/ZjnidqE.png

Would greatly appreciate your help offered.

Best Vishal