S3 2012 Loss Of Power In 4000-4500 Rpm

Hi guys. I am new here and I didn’t find what I am looking for so if it already is here I apologise. I have question about S3 2012.
When I ride I fell loss of power at 4000 rpm. When I leave throttle open the same (not fully, just to ride normally ) it feels like it dies an slowly accelerate to 4500 rpm where the bike shoots out
I have SC project single low mount with stock map. When I upload single low mount Arrow map then the loss of power is more significant. Bike has 27k km on speedo.
The loss of power isn’t like it doesn’t ride at all but it sometimes annoys me. Is it something like S3 feature or it can be some issue?