UE4/4.23 system font bug?

290308-usecmd.png

open editor cmd and type

Slate.EnableLegacyLocalizedFallbackFont
“1”

https://forums.unrealengine.com/unreal-engine/announcements-and-releases/1658668-unreal-engine-4-23-released?q=font

UI Bug Fix: Dragging a widget from a
non-canvas parent to a canvas in the
UI editor no longer causes the widget
to be offset. New: Made several
improvements to game controller
handling in UI code: Made a focus
change callback to FNavigationConfig
that can be used to override focus
changes or play a game-specific
effect. Added NavigationAction enum
and functions to navigation config to
replace hardcoded keys like
Virtual_Accept. This can be overridden
by a game to handle game-specific
remapping. Fixed SSlider to use
navigation instead of key input, which
fixes deadzone handling and allows
remapping. Added some functions to
KismetInputLibrary to query
navigation; this is useful for UMG
widgets that handle input themselves.
Deprecated: Legacy localized fonts are
now disabled by default. These have
been “soft” deprecated since 2014,
were formally deprecated (emitting a
warning if used) in 4.22, and will be
removed in 4.24. They can be
temporarily enabled again by setting
Slate.EnableLegacyLocalizedFallbackFont
to 1. You should instead ensure that
your font assets are set-up correctly
by using this overview.