rosbag2 doesn't record turtlebot3 scan messages

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To reproduce this, simply follow TurtleBot3's simulation tutorials and start it

$ ros2 launch turtlebot3_gazebo turtlebot3_world.launch.py

Confirm messages are sent with

$ ros2 topic echo scan

Try to record with

$ ros2 bag record scan -o tb3bag

And after a while, use info to check that nothing was recorded.

$ ros2 bag info tb3bag2
   Files:             tb3bag2.db3
   Messages:          0

Am I doing something wrong? Or should this be reported in rosbag2's issues?