Hi there,
I'm creating this topic cause I have any idea more what to do with this issue..
Setup to introduce:
- stock BAM in CupraR 1M + hybrid TFSI 064
- intake completly checked, no leaks
- new OEM Bosch MAF 86mm
- no EVAP, NOLRA set at 7, KFDLBTS and KFFDLBTS set 0
- no EGT
- new steel DV

I'm making a lot of km cause this is my daily (about 30k km per year) and car has 2 really easy to managed..as I could say..setups:
1. runs like a 'devil', great response, low fuel consumption, car feels in highway driving very 'light'
2. like a small parachute behind a car less throttle/boost response, higher consumption, generally less performance. I have to have 4-5% more throttle to stay at the same highway speed, for example 140km/h.

I have managed that 'on setup 1.' TARGET lambda is 14,7, on 2. - about 13,9-14,0. Short terms in both almost 0.  This is one general difference in logs between those. Ofcourse no faults, clearing faults changes nothing. Car is switching between those two settings as a lottery. At the begining I thought, that this is a MAF issue when MAF is reading different amounts of air and suddenly 'car' is in another place of KFLBTS map (different Load) but I'm sure too, that on 'setup ' all ranges of rpm's are like 'corrected' to another AFR. Car feels worse at driving 80, 100 and 160km/h too. This is not like a switching only 2 near points in the map. I'm almost 100% sure, that it 'sits' somewhere in software, not in the mechanic. Anybody knows such behavior and can help me? I'will be very thanfull...

eh, I was driving with a laptop but without logging. It is simple as I wrote: you have another target lambda on 31 with almost 0 correction at 1. Ofcourse Load a little bit different at the same speed cause to reach that I have to use a little bit more throttle. Why target lambda can change when long terms are off?

I don`t see how we can help you without datalogs.