Not finding installed font family on Windows

[Rony G. Flatscher]

Having installed the "IBM Plex" (otf) fonts (e.g. a file like "IBMPlexMono-Text.otf") to the global 
Windows font directory at "C:\Windows\Fonts" (%windir%\Fonts) the font family "IBM Plex Mono" and 
the like does not get listed with "javafx.scene.text.Font.getFamilies()".

Using javafx.scene.text.Font.getFontNames() the fonts are listed (e.g. as "IBMPlexMono-Text").

Is this to be expected, no font family, but font names carrying the name of the otf-font file only 
rather than the logical name of the "open type font"?

---rony

P.S.: This may be related to <https://bugs.openjdk.java.net/browse/JDK-8281327> although it sounds 
to be a different issue.