Odd Behavior from .docx file

[Robert Steinmetz AIA]

I received a .docx file from a customer. I loaded it into Libre Office 7 
and saved a copy as a .odt file. I need to reformat it and edit it. 
However whenever I add any thing or edit anything it it changes the text 
from black to a sort of gold color and noting I do can make it change 
back, except undoing all of my edits.

Any idea what is going on?
-- 

Robert Steinmetz AIA
Principal
Steinmetz & Associates

New Orleans & Atlanta