Hello,
I am using a master document to bring nine chapters/documents together. Since I started using the master document, I have been facing the following problems in the format of the text:
1. parts of the text keep changing to navy blue automatically, now most of it is in the automatically entered table of contents. Every time I change it to black, it changes to blue again after I close and re-open the document

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2. Font size and font type of certain parts of the text, some in the table of contacts and some within the body of the document, also change by itself. I used style and formatting to apply the setting of other text on them, but again, after closing and re-opening the doc, the same problem appears

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3. When I open the subdocument separately, some mixed font sizes appear. I had to send documents to my instructor, but they complain about the 'variety' in font sizes, although this does not appear in the master document itself

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Thank you for your time!