Jan,
For the turbine intake that is OK no doubt but the bypass air may be of such a high flow that it may cause a large pressure drop ahead of the turbine.
It may sound daft but a sensitive vacuum gage ahead of the intake may tell the story.
It is not far fetched to assume the bypass air being more than that for the turbine itself.
The engine then sees itself operating at the equivalent of a very high altitude.
Andre