Track Changes On, Text Disappearing

With track changes on in FM 2015 Unstructured, a colleague and I (2 instances on different machines and different books) are experiencing an odd error: the Conditional Text display does not match the definitions. In both instances, it is only in Chapter 1

Inserted text is expressing white text/white highlight instead of green/underscore.

Deleted text is expressing white text/white highlight instead of red/strikethrough.

Conditional text settings are the default settings for track changes.

I've tried:

• Re-importing the conditional text formats from a chapter in the same book that is not affected by this, as well as from Chapter 1 of our template book.
• Turning track changes off, then on again.
• Deleting the conditional text format