Auto motor standby / stop does not work at boot

[hilary-luo]

Version: 2.1.4-1jammy.20231205.190443
Use case: Turtlebot4 with ROS 2 Humble

Expected operation:
If the auto standby functionality is on, then after boot up, the driver will recognize that there are no subscribers and stop the motor.

Actual operation:
The motor starts up on boot up and remains running. If I manually subscribe and then unsubscribe, then the motor stops (after unsubscribing). Previously this was not the case although I do not have a version tag for when it was working as I expected.

Solving this issue solves: turtlebot/turtlebot4#286 (comment)

[hilary-luo]

Any update? This is still impacting users