Using emoji on a page disables inline commenting

Summary

Using Emoji on a Confluence Page prevents Inline Commenting

Environment

• Confluence 1000.95 (Cloud)
• Confluence 5.8.5 (Server)

Steps to Reproduce

1. Create a Page in Confluence which includes a Unicode-6 Emoji Character (📷 🏈)
2. Attempt to Inline Comment

Expected Results

A comment is added inline to the Page

Actual Results

When attempting to save the Inline Comment, an error appears indicating "Unable to Save The Comment"

Confluence logs show:

2016-05-18 22:43:05,223 ERROR [http-bio-1996-exec-49] [common.error.jersey.ThrowableExceptionMapper] toResponse Uncaught exception thrown by REST service: [com.ctc.wstx.exc.WstxLazyException] Illegal character entity: expansion character (code 0xd83c) not a valid XML character

Notes

Seems to only be affected by Unicode-6 Emoji
Using ⚽️ (not listed in the link above) seems to work
Emoji in the sidebar (not necessarily on the page itself) also seems to cause the error.

Workaround

Remove Emoji Characters from Page