That's quite odd. Might be because of the fact you were in the Library? Try using Cheat Engine and using VIII Justice in a Library again, and if it spawns a Beggar again then I'll edit it in the Tarot Cards page.
Found out that it ain't just the libary, i found a second VIII Justice card, and used it, not considering seeing a beggar appearing again, but guess what... It did. Wasen't in a libary at that point, didn't take a picture of it though, but after what i recall it was in a Secret Room (Not Super Secret), or in a normal room. My current version is The binding of Isaac - Wrath of the Lamb version 1.48 if im correct.