Hello Support Team,
Thanks for sharing your findings.
I believe the HEX character you mention (Hex: C29C, which is equal to ASCII: 156 and Unicode: 0153) is in fact the barcode’s End or “STOP” character and has in deed a graphical representation within the TTF. The list of all defined characters for this barcode font can be found here:
Should PD4ML not accept this and other defined control characters?