Debian: Application not shown in section

Dear xdg members,

a Debian (stretch) user reported an issue where an application (freeplane) is not
shown in the office section. So far I cannot reproduce this (GNOME3),
but the user reported [1] that it is "fixed" by this change:

--- /usr/share/applications/freeplane.desktop	2016-12-10 12:08:55.000000000 -0500
+++ freeplane.desktop	2018-03-20 14:16:27.182938569 -0400
@@ -2,7 +2,7 @@
 Version=1.0
 Name=Freeplane
 Exec=/usr/bin/freeplane %F
-Terminal=false
+#Terminal=false
 Icon=freeplane
 Type=Application
 MimeType=application/x-freeplane;

[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=893635

Here is the complete /usr/share/applications/freeplane.desktop:
[Desktop Entry]
Version=1.0
Name=Freeplane
Exec=/usr/bin/freeplane %F
Terminal=false
Icon=freeplane
Type=Application
MimeType=application/x-freeplane;
Categories=Office;
GenericName=Freeplane
Comment=A free tool to structure and organise your information with mind mapping
Keywords=Mindmaps; Knowledge management; Organize information; Brainstorming; ...;

Do you have any idea what might cause this?

Many Thanks and Best Regards,
-- 
Felix Natter

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