[Libreoffice-bugs] [Bug 131547] New: VIEWING At scroll gaps in displayed text - Render problem (?)

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=131547

            Bug ID: 131547
           Summary: VIEWING At scroll gaps in displayed text - Render
                    problem (?)
           Product: LibreOffice
           Version: 7.0.0.0.alpha0+ Master
          Hardware: x86-64 (AMD64)
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: Stefan_Lange_KA at T-Online.de

Created attachment 158955
  --> https://bugs.documentfoundation.org/attachment.cgi?id=158955&action=edit
zip file with 6 screenshots to show the problem

In LO 7.0 Writer builds from 2020-03-19 and later (=younger) scrolling by
scroll bar or mouse wheel results in gaps in the displayed text. The behavior
is the same regardless of whether OpenGL is activated or not.
To show the problem I have opened the same text document with the LO builds
from 
/daily/master/Win-x86_64 at tb77-TDF/2020-03-18_03.49.36/ and from
/daily/master/Win-x86_64 at tb77-TDF/2020-03-19_04.02.14/
with and without OpenGL activated. I have made screenshots, contained in the
attached zip file.
An other text document I have opened with the LO build from 2020-03-24. The
both screenshots do show as well the gaps as also the behavior described in Bug
131543.
The gaps do not occur when navigation within the document is made by keybord
(cursor keys, page keys etc.).

The problem only concerns the output on the display. The print output and
export e.g. to pdf is made correct.

Because of the same "starting date" (both first seen in builds from 2020-03-19)
I guess there is a relation to Bug 131543.

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