when re-launch the camera streaming program, the vision pro keep on showing the "Connected (Negotiating)" and the camera didn't streaming

[Shuteng-0608]

from avp_stream import VisionProStreamer
import time

avp_ip = "192.168.8.145"  # Vision Pro IP (shown in the app)
s = VisionProStreamer(ip=avp_ip)

# Configure video streaming from robot camera 
# "/dev/video6" is the color camera on the head
s.configure_video(device="/dev/video6", format="v4l2", size="640x400", fps=30)
s.start_webrtc()

while True:
    r = s.get_latest()
    # Use tracking data to control your robot
    head_pose = r['head']
    # right_wrist = r['right_wrist']
    # right_fingers = r['right_fingers']

    print(head_pose)
    time.sleep(1.0)

when I tried to run this python file, the first time it works, but after that I press "ctrl-c" to cancel, and run it again, it shows as below

(base) pangu@pangu-Default-string:~/pangu/src/arm_teleop$ /bin/python3 /home/pangu/pangu/src/arm_teleop/vptele/core/vp_test.py
WARNING: No data received yet. Is the VisionOS app running?
 == DATA IS FLOWING IN! ==
[WEBRTC] Starting server on 192.168.8.52:9999
[WEBRTC] Sending server info via gRPC...
[WEBRTC] Server listening on 0.0.0.0:9999
[WEBRTC] VisionOS client connected from ('192.168.8.145', 49192)
[video4linux2,v4l2 @ 0x7f30bc07b140] Dequeued v4l2 buffer contains corrupted data (0 bytes).
[WEBRTC] Server ready at 192.168.8.52:9999
[WEBRTC] VisionOS can query http://192.168.8.52:8888/webrtc_info to get connection details
[[[ 9.99453962e-01 -2.05463381e-03 -3.29799615e-02 -1.03579299e-03]
  [-1.43442012e-03  9.94426489e-01 -1.05422720e-01 -1.05506973e-03]
  [ 3.30127515e-02  1.05412446e-01  9.93880451e-01  1.19388723e+00]
  [ 0.00000000e+00  0.00000000e+00  0.00000000e+00  1.00000000e+00]]]
[WEBRTC] Connection established!
[WEBRTC] ICE state (('192.168.8.145', 49192)): checking
[WEBRTC] ICE state (('192.168.8.145', 49192)): completed
[video4linux2,v4l2 @ 0x7f30bc07b140] Dequeued v4l2 buffer contains corrupted data (0 bytes).
[[[ 0.99809825 -0.03773115 -0.04874846 -0.00954426]
  [ 0.03335197  0.99558699 -0.08771793 -0.00476144]
  [ 0.05184301  0.08592521  0.99495178  1.19367456]
  [ 0.          0.          0.          1.        ]]]
[[[ 0.9988659  -0.03176108 -0.03547625 -0.00635029]
  [ 0.02860677  0.99587303 -0.08613331 -0.00256079]
  [ 0.03806552  0.08502073  0.9956519   1.19341362]
  [ 0.          0.          0.          1.        ]]]

and the apple vision pro tracking app shows that "Connected (Negotiating)" and didn't show any camera streaming on it. If I restart my computer, it works again but only the first time again