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Created attachment 1472136 [details]
video of the bug

Description of problem:
When moving selected text over some other letters, LO Writer renders line cursor between letters, where mouse is travelling. These rendered line cursors remains till the affected text is re-rendered.

Version-Release number of selected component (if applicable):
libreoffice-writer-5.3.6.1-16.el7.x86_64

How reproducible:
always

Steps to Reproduce:
1. write some text in Libre Office Writer
2. select some part of text
3. move selected text over other part of text

Actual results:
There remains parts of cursor line in places (between letters) where mouse holding text moved.

Expected results:
No cursor parts should be rendered between other letters.

Additional info:
Tested on Lenovo X1 Carbon with Intel Corporation Skylake GT2 [HD Graphics 520] [8086:1916] (rev 07).
Happens also on T470 with Intel Corporation HD Graphics 620 [8086:5916] (rev 02), and probably others.

However, the issue does not happen in virtual machine with Red Hat, Inc. QXL paravirtual graphic card [1b36:0100] (rev 04).

Not reproducible any more with libreoffice-writer-5.3.6.1-18.el7.x86_64, no draw glitches of drag cursor now. Good job. Switching to verified.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2018:3054