unprintable chars

[cascafico]

Hello,
In announce stream section, my terminal is able to show only upper arrow character. What I suppose are circled N and circled P etc.
are substituted by a generic not printable char.

I'm using LXterminal 0.4.0 and

$> echo $LC_ALL
it_IT.UTF-8

UPDATE
for now solved setting

glyphs = plain
# glyphs = unicode
# glyphs = nerdfont

UPDATE:
Since config also refers to nerdfont, I managed to install suitable fonts; here's procedure for debian:

wget -P ~/.local/share/fonts https://github.com/ryanoasis/nerd-fonts/releases/download/v3.2.1/0xProto.zip && \
cd ~/.local/share/fonts && \
unzip 0xProto.zip && \
rm 0xProto.zip && \
fc-cache -fv