Meshes are not being displayed

[caioaamaral]

When opening the following scene:

<?xml version="1.0"?>
<sdf version="1.6">
    <world name="empty_world">
        <model name="ur10_fixed">
            <include>
                <name>ur10</name>
                <uri>model://ur10</uri>
            </include>
            <joint name="attached_to_ground" type="fixed">
                <parent>world</parent>
                <child>ur10::base</child>
            </joint>
        </model>
        <include>
            <uri>model://ground_plane</uri>
        </include>
    </world>
</sdf>

Only the frames are displayed, but no UR10's mesh is visible at the time.

Just after re-triggering the switch showVisuals it actually renders the UR10 model.