Camera drivers not shutting down after stop interface script

[hello-fazil]

The realsense and USB camera ros2 nodes keeps running in the background still after executing ./stop_interface.sh script.
These were nodes that required manual kills after stopping interface through the stop script.

ps aux | grep ament_ws
stretch+    3027  9.4  0.7 4649268 124164 pts/0  Sl   15:37  12:17 /home/stretch-se3-3002/ament_ws/install/realsense2_camera/lib/realsense2_camera/realsense2_camera_node --ros-args --log-level info --ros-args -r __node:=camera -r __ns:=/ --params-file /tmp/launch_params_uyehysay --params-file /tmp/launch_params_84xrdugx
stretch+    3031  0.3  0.4 1340580 64436 pts/0   Sl   15:37   0:25 /usr/bin/python3 /home/stretch-se3-3002/ament_ws/install/stretch_core/lib/stretch_core/d435i_accel_correction --ros-args
stretch+    3033 23.6  1.0 4281704 166020 pts/0  Sl   15:37  30:51 /usr/bin/python3 /home/stretch-se3-3002/ament_ws/install/stretch_core/lib/stretch_core/usb_cam --ros-args -r __node:=navigation_camera --params-file /tmp/launch_params_e36tdeul
stretch+    3035  3.7  0.4 1344360 68820 pts/0   Sl   15:37   4:52 /usr/bin/python3 /home/stretch-se3-3002/ament_ws/install/tf2_web_republisher_py/lib/tf2_web_republisher_py/tf2_web_republisher --ros-args -r __node:=tf2_web_republisher_node
stretch+   20130  0.0  0.0   9216  2560 pts/0    S+   17:48   0:00 grep --color=auto ament_ws