Issue template

• Hardware description: RK3399 runing unbutu 20.04
• RTOS: RK3399
• Installation type: source code compilation
• Version or commit hash: foxy

Steps to reproduce the issue

Just run the following line of statements in a loop to reproduce:
ros2 topic pub --once <topic forwarded by agent> <msg-type> <msg-data>

Actual behavior

Using htop to continuously observe, the memory usage grows slowly