mapping pkgs publishes a string in the last bit in the /map topic (map.data[])

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Hello All,

This is actually my first question. I am having a trouble with all the mapping pkgs in ROS2 when I echo the topic /map, I always get a string in the last bit of the map.data[], here is what I expect

` header: stamp: sec: 5158 nanosec: 179000000 frame_id: map info: map_load_time: sec: 0 nanosec: 0 resolution: 0.05000000074505806 width: 384 height: 384 origin: position: x: -10.0 y: -10.0 z: 0.0 orientation: x: 0.0 y: 0.0 z: 0.0 w: 1.0 data: - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1 - -1

- '...'

`

I want to subscribe on the /map topic from the the rosbridge_server pkg to build a map on a web page but I always encouter this error

[rosbridge_websocket-1] [ERROR] [1646827887.002034763] [rosbridge_websocket]: Exception calling subscribe callback: a bytes-like object is required, not 'str'**

Here is what I get:

I think it's because of the published string in the map.data[]. Have anybody encountered this error before?

Note: same setup works properly on ros1