java/openjfx8 applications can't display text

[asomers]

On recent versions of TrueOS Edge, applications using OpenJFX8 can't properly display text. Numbers work, but not text. The application I'm using is SportsTracker (not from ports), and I haven't updated its jars for about 1.5 years. The problem was introduced by a TrueOS upgrade sometime between 3-March-2018 and now.

> about

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General information
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boot environment now (N) … 12.0-CURRENT-up-20180327_233010 NR 2018-03-27
       after restart (R) … 12.0-CURRENT-up-20180327_233010 NR 2018-03-27
boot loader …………………………………… BSD
            type ……………………… EFI
CPU ………………………………………………………… Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz
    number of cores ……………… 8
host ……………………………………………………… threonine.lauralan.noip.me
memory ………………………………………………… 16384 MB available, 11606 MB free
OS git branch ……………………………………………………………………………………… trueos-master
OS git revision ………………………………………………………………………………… 072ecd92c
OS kernel build time ………………………………………………………… Fri 2018 Mar 16 18:11:44 UTC
OS kernel identity …………………………………………… (uname -i) GENERIC
OS platform (architecture) ……………………… (uname -m) amd64
OS release level ………………………………………………… (uname -r) 12.0-CURRENT
OS version and patch level …… (freebsd-version) 12.0-CURRENT
TrueOS package set ………………… EDGE
TrueOS version …………………………… TrueOS-Desktop-201803131015
uptime ………………………………………………… 11:14
user  …………………………………………………… somers

More (TrueOS Desktop):

    desktop environment …… Lumina
    sound card driver ………… pcm4: <Realtek ALC887 (Rear Analog)> (play/rec) default
    wireless driver ……………… 
    X11 drivers ………………………… nvidia_drv.so

[asomers]

Rebuilding openjfx8-devel from svn, with or without SWT, does not fix the problem. I'm afraid my Java skills may not be sufficient to debug this one.

[asomers]

The problem is not specific to SportsTracker; I've reproduced it with all the OpenJFX demo applications. However, I cannot reproduce it on FreeBSD 12. This seems to be a TrueOS-specific bug.
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227701