Description:
I love Libre Office. Awesome.  But the one single thing that's bothered me for ages is the "dirt" that regularly appears on documents and obscures lettering.  It appears as if the typing area is not being properly and regularly refreshed, leaving behind bits of prior character positioning.  The little black specks can halfway cover a current line and make it difficult to read.  

These heavy specs disappear if one scrolls down or up off of that section of page... if the document is long enough.  If not, I've found no way to remove them.  Perhaps a manual or automatic screen refresh (every 5 seconds or so) would help eliminate this issue (or... if possible find out what causes the dirt in the first place).

Thanks for your consideration of this matter... and keep up the excellent work!

Steps to Reproduce:
1. Normal typing in a Writer document
2.
3.

Actual Results:
Numerous heavy black specs (dirt) appear on the screen, evidently from prior text that is not being properly erased as one scrolls the screen.

Expected Results:
When scrolling the screen, all trace of prior text positioning should be erased and over-written by the current text area.


Reproducible: Always


User Profile Reset: No



Additional Info:
[Information automatically included from LibreOffice]
Locale: en-US
Module: Writer
[Information guessed from browser]
OS: Windows 10
OS is 64bit: yes