After start the bebop_nodelet.launch, use rqt_tf_tree tool, seems work fine.
use rostopic echo /bebop/joint_states seems get the correct camera Pan&Tilt states.
and I try to move the virtual camera, for example,
rostopic pub /bebop/camera_control geometry_msgs/Twist "linear:
x: 0.0
y: 0.0
z: 0.0
angular:
x: 0.0
y: -10.0
z: 0.0"
The camera view is moving, but use rostopic echo /bebop/joint_states can't get any messages any more, and rqt_tf_tree tools shows bellow,

It seems that the connection is interrupted.
How to fix it?
Thanks!