why the time stamp of the message is later than the rosbag time?

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I'm debugging my code with rosbag replay. In my code, I did tf transform like this:

tf.transformPose(target_frame, input_pose, output_pose);

Sometimes, there's an exception thrown, which read:

"Lookup would require extrapolation into the future.  Requested time 1484037737.206813097 but the latest data is at time 1484037724.492085834, when looking up transform from frame [odom] to frame [map]"

I checked in the debugger, and found the time stamp of the message input_pose is later than the rosbag time:

p input_pose.stamp_ 
$1  sec = 1484037737, nsec = 206813097
p ros::Time::now()
$2  sec = 1484037724, nsec = 918256570

Also, the rosbag play console shows:

 [PAUSED]   Bag Time: 1484037724.967132

The commands I used to run the rosbag is

rosbag play --clock --pause bagfile.bag

And the param use_sim_time is already set to true:

$rosparam get use_sim_time
true

Could anyone please help with this problem? Thanks!