Helicopters jump in and out of ground effect when near raised platforms, the CFD is not calculating the drop

[Kuse1]

@Scip2009

The helicopter tends to drift to the left when hovering in an open field without wind. To keep it still, I have to keep it to the right with a roll angle of approx. 3° to 5°

As far as I know, this is simulated absolutely correctly and is a peculiarity of this helicopter. The H125 tilts about 3-5° to the right when hovering. In forward flight, this tilt balances out aerodynamically.
You can see this clearly in the following video:

Helinet (KABC TV) Airbus Helicopters H125 Start Up and Departure

first the left skid lifts and only then the right one. In hovering flight, this helicopter is always tilted slightly to the right.