I have a problem with an echo 1st gen stopping streaming BBC radio 2 whilst in the kitchen, sometimes it recovers after a short period, sometimes I have to power it down and restart it. I also have an echo dot which does not exhibit the same problem when in the same location in the kitchen connected to the same WiFi mesh.
When the echo stops streaming it will still operated smart switches so it is still connected to the WiFi.
Has anybody any idea why there is a difference in performance between the two devices which both have the latest software, echo = 658655620 whilst the dot = 661663920.