RS3 boost dropping back

[csp22uk]

Hi guys,
new 2016 RS3 owner here, only had the car a week, bog standard and bought from main dealer with 30k on the clock.

I have run into an intermittent boost issue, if gunning it hard 2 to 3 to 4th, the boost occasionally drops back 4k rpm and kicks back in higher up the rev range - as if its being pulled back by the ECU.

I purchased a genuine VCDS cable and have the following from the Engine ECU.
Its the first time I used VCDS so still figuring out how it all works, normally I would plan to erase the codes and see what re-appears, but I was planning on taking it back to the dealer to resolve as it has 2 yrs warrenty.

Are any of the below to worry about or random ones that can appear?
Thanks in advance

5 Faults Found:
11913 - Start/Stop System; Maximum Time for Restart Exceeded
P167E 00 [096] - -
Intermittent - Not Confirmed - Tested Since Memory Clear

2636 - Low Pressure Fuel regulation
P310B 00 [096] - Fuel Pressure Outside Specification
Intermittent - Not Confirmed - Tested Since Memory Clear

9025 - Manifold / Barometric Pressure Sensor (G71) / (F96)
P0106 00 [032] - Implausible Signal
Intermittent - Not Confirmed - Tested Since Memory Clear

4201 - Fuel Level too Low
P1250 00 [032] - -
Intermittent - Not Confirmed - Tested Since Memory Clear

18105 - Catalyst System; Bank 1
P0420 00 [096] - Efficiency Below Threshold
Intermittent - Not Confirmed - Tested Since Memory Clear