Thanks a lot Jane!
I investigated as suggested and found where it goes wrong.
I enter “China” (in English), not “Chine” (in French), and I click on “China”:
The issue occurs first with the highlighted request above, which is:
The response is about the place “Chinese University of Hong Kong”:
“ancestor_place_ids”:[97395,125119]
Now I replace “chine” by “china” in the URL above:
The response is now about the place “China”:
“ancestor_place_ids”:[97395,6903]
At some point we switch automatically from the input “China” to the value “Chine” (because my Windows edition is in French?) and we get the place “Chinese University of Hong Kong” (starting with “Chine…”) instead of the desired place “China”.