Why some TTF fonts are not working with Font.loadFont() in Java?

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Java

font

JavaFX

I want to include fonts with my JavaFX application in the jar executable.

font_stream = Javachessgui2.class.getResourceAsStream("resources/fonts/"+current_style.font);
        
        chess_font=Font.loadFont(font_stream, piece_size);

This code works for certain fonts, but not all TTF fonts. Some TTF fonts which if I install under Windows are working fine in a text editor, but when loaded in my JavaFX application, they break down. The text displayed is either empty or random dots and lines.