Demo 2.1, 2.2: The robot in rviz disappears after a few seconds

In demos 2.1, 2.2 for motion planning, when I launch the rviz using the cmd: roslaunch smart_grasp_mod_moveit_config demo.launch
the robot disappears after a few seconds and only the left part of the rviz panel is left.

Thank you in advance

Hello @alexander.skycaptain ,

Have you tried maximizing the RViz window? I think that might be the problem. If not, could you share a screenshot of what you get?