What technical failure, what happens? Are you recording the live stream in Wowza, or the encoder? FMLE will keep going and going, if it gets disconnected it will start trying to re-connect. There is not a way to reset on the Wowza side.
You can affect whether the Wowza server-side recording is versioned or appended when the stream re-publishes. The default is version, to change add these two Property settings to the /conf/[app-name]/Application.xml /Streams /Properties container: