Have a small unwanted deceleration on a flying character

Like in the title I have a small deceleration on a flying character no matter what its friction or deceleration parameters, it is replicated on a clean blueprint character is there a hidden variable or something?
Edit: Quite interesting there no such deceleration while a character in walking mode.

is there a hidden variable or
something

Discovered this by sheer accident not so long ago.

I think the goal of the character movement component to have its own volume is to simulate air friction. It IS well hidden!

Holysh*t thanks, I was really sure that I needed to open up C++ again and dig through all of the character code just to find something, you a life saver!