Gazebo model's pointcloud magically disappears leaving a shadow

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Hello all,

I am using ROS melodic with gazebo version 9.11.0. I have an issue which I am not sure if it's related to gazebo or ROS.

I am trying to simulate a panda emika robotic arm with a Kinect sensor plugin attached to its end effector. The world has got a pitcher model. I am trying to analyze the pitcher's point cloud by changing it's pose run time. But at random instances, the pitcher magically disappears with the shadow. I did check the model states' feedback from /gazebo/model_states. The scenario looks as shown here:

Thanks in advance!