Found by Laurent Gaffie <firstname.lastname@example.org>
Patch to follow.
Created attachment 5501 [details]
git am patch.
Written by Volker, confirmed by the bug reporter. Applied to master.
Re-assigning to Karolin for inclusion in the next 3.5.x and 3.4.x.
Pushed to v3-5-test and v3-4-test.
Closing out bug report.