AddForce() after compiling

I have this code binded on button:
GetCharacterMovement()->AddForce(FVector(( 3000000.0), 0.0f, 3000000.0));

The problem is that just after compiling project horizontal velocity of character reaches something about 800.0f. After 1-2 throws it gets back to normal 300-350 and keeps being that way until another recompile.