I don't know that I can diagnose the issue without being able to see a sample file with the problem.

If there are other instances, is there any attribute that might link them together. There seems to be a massive number of instances in that item. Does this symbol occur in items with less hits? Is the XE field situated in a regular paragraph? Are there content controls or tracked revisions in your document?

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Andrew Lockton
Chrysalis Design, Melbourne Australia