Now after more than 1 hour of debugging with the help of @leader21 (thanks!) i’ve released version 0.2.4.
It seems that the problem was that echo supports not more than about 50 devices per bridge. This update adds a counter that won’t add more than 50 devices.
A future update will get the much requested white list, so devices don’t have to be excluded, but explicitly included, to be available for Alexa. For now this quick fix should be enough.
@hyperx Please test if it works with your setup, too.