Cupra 1P falling rpm problem

[Cupra 1P R310]

hello, I am asking for help and advice

The car is Cupra 1P 2.0 tfsi cdla R310

When I put it in neutral while driving, RPM drops to approx. 450 rpm and fluctuates for a while, then stabilizes at 800rpm.
when the car is stationary, the revs do not fluctuate.
no engine code

I added two videos. When the car is driving. And when the car is stationary. I also added a short vcds log. Go kiksu.net/vcds-graph/ and see the log.

I changed:
1. NGK iridium BKR7EIX
2. APR COIL MS100208
3. GFBDVT9451
4. Proram 90mm oversize intake

I cleared the MAP senzor. Without a change

Any ideas? I have a vcds diagnostic. I can make live data.

Thanks for help

 

[Cupra 1P R310]

 

[ZiggyEP3]

I would be checking there are no air leaks after the air flow sensor. As I had bouncing revs one time and it turned out the intake pipe had come loose after the air flow sensor spoiling the air the engine thought it was getting.