Hello Andy,
I have same issues on my Qu 24.I found out what the problem was.
I had overgain structure.
Most important is that you set gain in PFL mode,not on the touch screen but on PFL meter.I found out that factory set gain is best way to start with.On QU is 26 dB.
STATIC BURST is nothing else than overloading ADC.
Try and let me know if that worked out.