https://bugs.kde.org/show_bug.cgi?id=424665

            Bug ID: 424665
           Summary: Closing one of multiple canvases causes display/input
                    error
           Product: krita
           Version: nightly build (please specify the git hash!)
          Platform: Compiled Sources
                OS: Microsoft Windows
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: CPU Canvas
          Assignee: krita-bugs-n...@kde.org
          Reporter: yggdrasilin...@gmail.com
  Target Milestone: ---

SUMMARY
Krita version 4.3.1-alpha (git 90110be), however this has been occurring for me
since the base 4.3 update at least, that I've noticed.

When I have more than one canvas open at a time, if I close the canvas that I
am currently viewing, the program will automatically have me view another open
canvas. This part is normal. However, if I attempt to interact with the canvas
in any way, instead of displaying the changes I make to the image, it will tile
the brush cursor, or any objects I attempt to paste and transform. I can still
interact with the canvas by drawing or editing layers, but I cannot see what I
have done, and it does not save changes post-error. I am also still able to
save the canvas, close and open it and other files, and switch to other
canvases. Switching canvases also happens to make the error stop.

The error does not occur if I close a canvas tab that I am not currently
viewing.


STEPS TO REPRODUCE
1. Have more than one canvas open
2. Close the canvas that you are currently viewing
3. Attempt to draw on or otherwise interact with your canvas

OBSERVED RESULT
If you attempt to draw on the canvas, the brush cursor will tile and trail
instead of displaying any changes to the file. If you attempt to paste an image
from your clipboard it will appear on a new layer as normal, and attempting to
transform it will create a similar tiling/traling effect.

EXPECTED RESULT
I'm not entirely sure what this section means, but if it's referring to what
SHOULD be occurring when I input the actions, I should simply be able to view
and continue working on the newly displayed canvas. Pardon me if how I've
filled this section in is not useful; I've never submitted a bug report before.


SOFTWARE/OS VERSIONS
Windows: 10
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION

I have not attempted this on another system or OS, so I want to apologize if
this is somehow an individual issue. My current canvas display settings under
the Display > Canvas Acceleration tab is set to  enable canvas graphics
acceleration, with the current renderer set as Direct3D 11 via ANGLE, with high
quality filtering and texture buffer enabled.

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