Incorrect display of RTL ornate parentheses in ADE 4.5.5

I am creating an EPUB with InDesgin CS6. The document has both Arabic (RTL) and English (LTR) text.

In Arabic, although text is RTL, numerals are LTR.

In the Arabic section I am using numerals (LTR) within ornate parentheses (RTL). A paragraph style has been applied to the text and a character style to the numerals to ensure correct text direction. A sample is as follows:

The Unicode for these ornate parentheses is as follows:

• FD3F  ORNATE RIGHT PARENTHESIS
• ‎FD3E  ORNATE LEFT PARENTHESIS

The parentheses are displayed correctly in InDesign and all the EPUB readers I have tested with, apart from Adobe Digital Editions 4.5.5. For some reason, in ADE the direction of the parentheses is reversed, as follows:

Why is ADE the only reader I can find that behaves like this, is it another bug?