This morning I was puzzled why I was getting no output on 20m FT8 with the QMX+. Disabling the SWR protection solved the mystery as the SWR exceeded 3:1 and this was preventing TX. I turned the protection back on as 20m is a band I rarely use.
On 6m FT8, I had 4 spots of my QRP from the QMX+. I am still getting insufficient audio on 6m FT8 RX. This still requires further investigation.