There it a bug which occurs when the following takes place.

1. Track changes is activated for a text frame in InDesign.
2. A user adds text that will include a hyperlink.

(See Image1.)

1. A second user creates the hyperlink in the text.
2. This user also then makes a change to the text that contains the hyperlink.

(See Image2)

1. If the ICML file is exported for editing in InCopy and then placed again into the document the formatting will change in the places where the original content was added - which follow the change in the text which contains the hyperlink. Depending on how this occurs text content can also be duplicated following the original text.

(See image3)

Image3 shows that the default hyperlink styling (blue with underlining) now extends to the end of the original text. The hyperlink itself also extends that far.

This will happen in any place where a change occurs in text containing a hyperlink that was originally added by another user. It is not likely to occur very often (due to the nature of the steps that need to occur in a specific order) however the results could very big problems if they are not caught.