I installed ROS Kinectic on my Ubuntu 16.04 which came along with Gazebo 7.12. I am trying to follow the tutorials for getting started on gazebo. I face a vrey basic problem on my Laptop. I could not do the first exercise of scaling a simple object. on model editor ( http://gazebosim.org/tutorials?cat=guided_b&tut=guided_b3 ) . I click the scale mode, and then click the object, it works fine, but as soon as I click one of the axix to drag, the axis jumps to origin and the object does not get resized. I can not figure out why this occurs on my pc. Could anyone help with troubleshooting?
A gif of the problem:

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