waiting for opponent to move and I lose by abandonment ??
That means you had been disconnected from the live server.
Are you playing on the iOS app?
Staff are looking into potential issues with the iOS related to similar issues so that should hopefully be resolved soon for those seeing the issue.
I'm not 100% sure if the chat works through the live server on the way the iOS app connects.
Games don't get removed and the abandonment flag is based on a percentage of recently completed games so should have any long term impact.