perception_obstacle error

[AOOOOOA]

Describe the bug

In what area(s)?

/area runtime

Steps to Reproduce the Problem

Steps to reproduce the behavior:

1. Run this command in the container to start Dreamview: ./scripts/bootstrap.sh
2. Start the bridge and spawn the ego vehicle: python carla_cyber_bridge/bridge.py and python carla_spawn_objects/carla_spawn_objects.py
3. Start a co-simulation: Open apollo client: http://localhost:8888
4. python main.py

Expected Behavior

Actual Behavior

The channel perception_obstacle in dreamview report the time delay normally. But in the terminal, there are not any message passing through the channel. I tried to use cyber_channel echo and there are not any message printed out.
Why? I found the issues ApolloAuto/apollo#15319, is the error related to it?

[YangXianqi]

Hey，can u help me to fix the problem of failing to lookup tf because of the timestamp?