Pixel Streaming can only deliver one stream at a time in version 4.27

Hello.

I’m trying to use Pixel Streaming with version 4.27 of the Unreal Engine.

I looked at the sample page with reference to the following page, but it seems that I can only display one stream at a time.

When I access it in the second tab of Chrome, I get the text “WebRTC connected, waiting for video” and the stream does not appear.

If you close the first tab, the stream will appear in the second tab.

I thought there might be an argument to limit the number of streams, so I looked for the following reference, but could not find it.

The server has plenty of CPU, GPU and memory, so I don’t think it’s a performance issue.

This problem did not occur in version 4.26 of the Unreal Engine, and only occurred in 4.27.

If anyone has any information on this, please let me know.

P.S.
I am not good at English and used automatic translation.
Thank you for reading.

Sorry about that.

I used the Signaling Web Server of Ver. 4.27 and it solved the problem.

The cause of the problem was that the Signaling Web Server of Ver. 4.26 was extended and used.