Cannot launch gzclient on a launch file - results in shared_ptr assertion error

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• System: Ubuntu 18.0.4
• ROS distro: ROS 2 Dashing
• Gazebo version: 9.13.2
• gazebo_ros: 3.3.5-3bionic.20200711.114532
• gazebo_ros_pkgs: 3.3.5-3bionic.20200711.125338

Hi there,

So I have a weird issue where I can use, for example, ros2 launch gazebo_ros gazebo.launch.py verbose:=true pause:=true Timer:=true, or even the spawn_entity_demo.launch.py example correctly after sourcing the global space setup.bash (with source /opt/ros/dashing/setup.bash), but after sourcing a local (colcon) workspace, I am not able to launch any of these examples, resulting in an error as follows:

gzclient: /usr/include/boost/smart_ptr/shared_ptr.hpp:734:typename boost::detail::sp_member_access<T>::type boost::shared_ptr<T>::operator->() const [with T = gazebo::rendering::Camera; typename boost::detail::sp_member_access<T>::type gazebo::rendering::Camera*]: Assertion `px != 0' failed.

which as far as I know is a common error which might have many different sources. The one I am pointing right now is to the possibility that the Gazebo env variables get disconfigured/changed when sourcing the workspace, but I don't have anything in the workspace that actually triggers a change in GAZEBO_*_PATH variables.

The above is some of the tests I tried outside of the custom launch file I am creating, but the idea is to run a launch file that as a structure like the following:

   gazebo_launch_dir = os.path.join(
      get_package_share_directory('gazebo_ros'), 'launch')

   ...

    IncludeLaunchDescription(
        PythonLaunchDescriptionSource(
            [gazebo_launch_dir, '/gzserver.launch.py'])
    ),

    IncludeLaunchDescription(
        PythonLaunchDescriptionSource(
            [gazebo_launch_dir, '/gzclient.launch.py'])
    ),

The above launch file also fails on launching the client, as spoken.

Any tips to find the problem causing this are welcomed. Thanks in advance!