[Libreoffice-bugs] [Bug 121900] New: VIEWING: Toolbar buttons flashing on hover, failing to show tooltips for adequate time

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=121900

            Bug ID: 121900
           Summary: VIEWING: Toolbar buttons flashing on hover, failing to
                    show tooltips for adequate time
           Product: LibreOffice
           Version: 6.1.3.2 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: UI
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: giradischi0001 at gmail.com

Created attachment 147275
  --> https://bugs.documentfoundation.org/attachment.cgi?id=147275&action=edit
Video capture of a small portion of the screen, showing a button+caption
flashing and CPU usage graph.

In all LibreOffice applications;
With any GTK3 theme;
Also after deleting .config/libreoffice configuration folder;
Current version (previous versions were not affected, however I have not used
any Libreoffice application in the past 3 months):
  Version: 6.1.3.2
  Build ID: 6.1.3-2
  CPU threads: 4; OS: Linux 4.19; UI render: default; VCL: gtk3; 
  Locale: it-IT (it_IT.UTF-8); Calc: group threaded

Issue:
Any button of the toolbars, when hovered, starts to flash the tooltip (popup
caption), and flashes itself, too. Watch the video for more clarity.
Cpu utilization rises slightly from 0.6% (idle LibreOffice) to 25% on one core
at (or just above) minimum clock frequency (0.48 GHz) (LibreOffice while one
button and its tooltip are flashing).

The tooltips shown on hovering the ruler at the top of the page flashes the
same way.

Things in the status bar are not affected (they don't flash). (the bar at the
bottom of the window, where zoom, page layout, cursor line&column are). Also,
the '»' buttons that show the remainder of a toolbar which is too long to fit
the screen, is not affected.

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