Map is frozen + "[rviz2]: Message Filter dropping message: frame 'base_scan'" [Foxy]

edit

I'm just following the turtlebot3 tutorial and running the SLAM node.

When I launch the cartographer via:

$ export TURTLEBOT3_MODEL=burger
$ ros2 launch turtlebot3_cartographer cartographer.launch.py

Rviz loads and everything seems to working fine -- until I move the robot with teleoperation keyboard, and after a few moments, I keep receiving the following [INFO] messages in large chunks:

[rviz2-3] [INFO] [1662677178.185090678] [rviz2]: Message Filter dropping message: frame 'odom' at time 1662677176.963 for reason 'Unknown'
[rviz2-3] [INFO] [1662677178.256606458] [rviz2]: Message Filter dropping message: frame 'base_scan' at time 1662677177.034 for reason 'Unknown'
[rviz2-3] [INFO] [1662677178.262044666] [rviz2]: Message Filter dropping message: frame 'odom' at time 1662677177.013 for reason 'Unknown'
[rviz2-3] [INFO] [1662677178.391455631] [rviz2]: Message Filter dropping message: frame 'base_scan' at time 1662677177.135 for reason 'Unknown'

And only the frame is visible in RViz (the odom and other stuff disappears).

I'm totally new to this ROS thing. Running ROS2 on Ubuntu 20.04.04. Could someone please help me understand what the problem is? Thanks.