Text becomes fuzzy, then clears

Mac user, ODT file, text is clear, click near end of line, and text suddenly becomes fuzzy.
Click in the header or footer, and the text clears.
Assumption: I’ve made some setup change that has caused this.
Please, help sought!

After additional search, there does seem to be an answer.
In LO Writer, under the Edit tab, there is an entry “Direct Cursor Mode”. This was turned ON.
When Direct Cursor Mode is turned OFF, the text never becomes fuzzy.