I have already mentioned the Case to the Alexa team regarding this problem
Case ID : 6927224391
I have a issue when i playing my camera on Echo.
When I sent the command to watch the camera with Echo on 2020-04-08 17:13:41.
According to Lambda log, Alexa received the command and I correctly that my server returned the stream url. However, according to my monitoring of the streaming media service, Echo did not request the stream url this time.Echo gave me the response: sorry, the camera didn't respond.
Then I immediately launched another request on 2020-04-08 17:13:58, this time the Echo also received the Stream Url normally, this time the Echo requested my Stream Url, and the Echo played the video normally.
This issue usually occurs when the camera is synchronized to echo, the request is made after a period of time, the first total response device does not respond, and then the next request can play normally.