Image_transport warning of unsyncronization

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Hello.

I am trying to use the package depthimage_to_laserscan. My launch file to do this is the following:

 <node pkg="depthimage_to_laserscan" type="depthimage_to_laserscan" name="depthimage_to_laserscan">
    <remap from="image" to="/camera/depth/image"/>
    <remap from="camera_info" to="/camera/depth/camera_info"/>
  </node>

The problem comes when y launch it and am image_transport warn appears:

[ WARN] [1619004832.858784407]: [image_transport] Topics '/camera/depth/image' and '/camera/depth/camera_info' do not appear to be synchronized. In the last 10s:
    Image messages received:      75
    CameraInfo messages received: 75
    Synchronized pairs:           0

I have tried to use the ApproximateTimeSynchronizer to syncronize these topics, but with this, they still don't syncronize. this is my file to use the syncronizer:

#!/usr/bin/env python3

import rospy
import message_filters
from sensor_msgs.msg import Image
from sensor_msgs.msg import CameraInfo

rospy.init_node('sync_node')
rospy.loginfo("Sync started")

def callback(image_raw, image_info):
    print("callback")

image_raw = message_filters.Subscriber('/camera/depth/image', Image)
image_info = message_filters.Subscriber('/camera/depth/camera_info', CameraInfo)
ts = message_filters.ApproximateTimeSynchronizer([image_raw, image_info], 10, 0.01, allow_headerless=True)
ts.registerCallback(callback)
rospy.spin()

Checking the header of both topics, the stamp is almost equal (difference of 1-3 ms).

What is wrong?

Thanks in advance.

Best regards. Alessandro