This happened a second time, with the same map (Fire Chiasm).

I just started the Heart of Gold campaign, and I got a correctly displayed unit bar, with the arrows.

I reckon that the UI is in HTML+CSS+JS. Is there some sort of debug console that could help understangin what is going on ?

What happens when there are too many units to display ? Is there some sort of scrolling system ?

Setting HUD size to 101% gives a correct display as well (so the bug is not triggered by scaling).

Setting HUD size to 102% causes the unit bar to disappear.

GPU is FirePro V4800 with open-source drivers from Ubuntu 16.04 (64 bits).

Player.log

Obtained by opening WFTO, setting HUD size back to 100% (was 104%), opening Home dungeon and then quitting.

NOTE : the unit bar correctly appears in this setting.

Player.log

Obtained by opening WFTO, opening Home dungeon and then quitting.

I do not know what 4K resolution is. Screen resolution is 1920*1200.

In case this helps, here is my environment (I think it contains informations relative to the input method) :

```

XDG_VTNR=7
CAML_LD_LIBRARY_PATH=/home/yann/.opam/4.02.0+improved-errors/lib/stublibs
MANPATH=:/home/yann/.opam/4.02.0+improved-errors/man
XDG_SESSION_ID=c2
XDG_GREETER_DATA_DIR=/var/lib/lightdm-data/yann
CLUTTER_IM_MODULE=
QT_STYLE_OVERRIDE=gtk
SESSION=xubuntu
GPG_AGENT_INFO=/home/yann/.gnupg/S.gpg-agent:0:1
GLADE_PIXMAP_PATH=:
XDG_MENU_PREFIX=xfce-
SHELL=/bin/bash
TERM=xterm
QT_LINUX_ACCESSIBILITY_ALWAYS_ON=1
PERL5LIB=/home/yann/.opam/4.02.0+improved-errors/lib/perl5
WINDOWID=75497476
UPSTART_SESSION=unix:abstract=/com/ubuntu/upstart-session/1000/3632
GNOME_KEYRING_CONTROL=
OCAML_TOPLEVEL_PATH=/home/yann/.opam/4.02.0+improved-errors/lib/toplevel
USER=yann
LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.cab=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.oga=00;36:*.opus=00;36:*.spx=00;36:*.xspf=00;36:
CLUTTER_BACKEND=x11
QT_ACCESSIBILITY=1
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
GLADE_MODULE_PATH=:
XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
SESSION_MANAGER=local/yann-Precision-T1600:@/tmp/.ICE-unix/3802,unix/yann-Precision-T1600:/tmp/.ICE-unix/3802
DEFAULTS_PATH=/usr/share/gconf/xubuntu.default.path
XDG_CONFIG_DIRS=/etc/xdg/xdg-xubuntu:/usr/share/upstart/xdg:/etc/xdg:/etc/xdg
DESKTOP_SESSION=xubuntu
PATH=/home/yann/.opam/4.02.0+improved-errors/bin:/home/yann/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
QT_IM_MODULE=
XDG_SESSION_TYPE=x11
PWD=/home/yann
JOB=dbus
XMODIFIERS=
GNOME_KEYRING_PID=
LANG=fr_FR.UTF-8
GDM_LANG=fr_FR
MANDATORY_PATH=/usr/share/gconf/xubuntu.mandatory.path
IM_CONFIG_PHASE=1
GDMSESSION=xubuntu
SESSIONTYPE=
SHLVL=1
HOME=/home/yann
XDG_SEAT=seat0
LANGUAGE=fr_FR
SDL_AUDIODRIVER=alsa
UPSTART_INSTANCE=
GTK_OVERLAY_SCROLLING=0
UPSTART_EVENTS=started xsession
XDG_SESSION_DESKTOP=xubuntu
LOGNAME=yann
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-7ntHaWqvgQ
XDG_DATA_DIRS=/usr/share/xubuntu:/usr/share/xfce4:/usr/local/share/:/usr/share/:/var/lib/snapd/desktop:/usr/share
QT4_IM_MODULE=
LESSOPEN=| /usr/bin/lesspipe %s
INSTANCE=
UPSTART_JOB=startxfce4
XDG_RUNTIME_DIR=/run/user/1000
DISPLAY=:0.0
GLADE_CATALOG_PATH=:
XDG_CURRENT_DESKTOP=XFCE
GTK_IM_MODULE=
LESSCLOSE=/usr/bin/lesspipe %s %s
XAUTHORITY=/home/yann/.Xauthority
COLORTERM=xfce4-terminal

```