
Looking closely at text boxes (and tables), as suggested by Hayes McCoy, I notice that there seems to be an issue with the display of text in any text box which is positioned on top of a table.
I haven't tested in a document with multiple text boxes.
However, I do see that typing a sentence inside a text box which is on top of a table cell only shows the first character. I can force the display of all the text if I resize the text box. See the screen shot below.
In other words, there is obviously something going on here.