https://bugs.documentfoundation.org/show_bug.cgi?id=172193

            Bug ID: 172193
           Summary: Writer: Lines over inserted/attached images after
                    scrolling up/down only when image's property anchor is
                    set "as character"
           Product: LibreOffice
           Version: 25.8.6.2 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: [email protected]
          Reporter: [email protected]

Description:
I have multiple documents MS Word (*.docx) with multiple attached images, on
which strange white/gray lines appear over the attached images when scrolling
up/down to a next/previous page outside those being displayed, after multiple
thinkering I found that this only happens when the image's anchor is set "as
character" instead of the default "to character" in the position and size
property tab, and only when the images are exactly between the viewport (half
of the image is visible and the other half isn't).
The lines appear to be form the edge of the up and down toolbars.
I guess either MS Word or Libreoffice's Writer set that property when importing
docx documents.

OS: Fedora 43, Wayland, Nvidia drivers.

Steps to Reproduce:
1.Open or create a new MS Word document, docx
2.Insert an image, preferably something dark, a black square works
3.Right click over the attached image then properties, then position and size
tab, then set Anchor to "as character", click ok.
4.Either move the attached image down to a second page or add text before/after
it until you get a second page.
5.Scroll up or down until the image can't be seen in the viewer then scroll
back again until half of the image is visible then again in same direction
until the entire image is visible.


Actual Results:
White/gray lines will appear over the attached images exactly where the
toolbars edges where over those images.

Expected Results:
Attached images shouldn't show any artifacts/lines.


Reproducible: Always


User Profile Reset: No

Additional Info:
This only happens when the image's properties anchor is set to "as character",
when the anchor is set to "to character" they look fine.

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