When text with Code 128 font is rendered in RadRichTextBox, there are some unexpected behaviours:
- Spaces are not rendered (they have special representation in Code 128). This issue will be reproduced for all fonts which define special (non-empty) representation of the space character.
- During rendering, UI inserts  "Left-to-Right Mark" character and "Right-to-Left Mark" character, which are not defined in the font and appear as .notdef glyph, which is white rectangle. This issue will be reproduced for all fonts which do not define these characters.