D1149: Print Detected An Invalid Unicode Character
Direct2D Print: Invalid Unicode character detected in DWRITE_GLYPH_RUN_DESCRIPTION.string. It was replaced with space (0x20).
Direct2D Print considers invalid characters noted in Unicode documentation, as well as certain ASCII characters outside of the visible range, to be non-printable. Use of these characters does not cause an error. Rather, Direct2D Print will substitute these characters with spaces.
To avoid this notification, do not use malformed Unicode characters or non-printable ASCII while drawing text for printability.