AES/newspost wrote:

Is that likely the case?

It's more likely that they're encountering turbulence which makes it difficult
to maintain altitude.

George Patterson
Love, n.: A form of temporary insanity afflicting the young. It is curable
either by marriage or by removal of the afflicted from the circumstances
under which he incurred the condition. It is sometimes fatal, but more
often to the physician than to the patient.