moveToPositionAsync cannot control the vehicle simple_flight in Z axis

[sinancimen]

Question

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I am simulating 6 simple_flight quadcopters. I modified SimpleFlightApi.hpp to reduce the distance accuracy to 0.1m. In X and Y coordinates, I am able to get 0.1m accuracy roughly. I am controlling 6 vehicles simultaneously. In Z axis however, quadcopters are not able to reach the target, they even do not seem trying to correct it. Differences in Z axis between current position and target are between 0.3-0.4m. Why does it behave in that way?

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Context details

OS: Windows
AirSim version: 1.8.1
Python version: 3.8
Unreal version: 4.27.2

Include details of what you already did to find answers

Tried out several parameters like lookahead and adaptive_lookahead but couldn't find a working solution.