Investigate cause of crash of RL demo during gazebo community meeting

[arjo129]

Environment

• OS Version: Ubuntu 24.04
• Source package

Description

• Expected behavior: Pausing while visualizing playback in the RL script should not lead to a crash. It should simply block the executor.
• Actual behavior: Pausing while visualizing playback in the RL script leads to weird physics behaviour.

Steps to reproduce

1. Run the RL example script
2. When the visualization starts hit pause
3. Wait for a long time
4. Hit play

Output