Created attachment 176048 [details]
Screenshot of lineart and preview image with the project in the background.

I would paste that layer into a new document to try to solve the issue with the black part not showing up but it just makes the entire background white despite it only having brush lines as a transparent image. The other colored part of the lineart that isn't black functions correctly anytime I turn the visibility on and off but the black part stays invisible and shows all of the layers underneath. I would move it and it stays invisible. I don't know which part of the application is causing this bug and it is only an issue with that layer. I don't have any other parts that are only black showing but the PAINT LAYER 1 and PAINT LAYER 2 are both black and show up properly when I turn the visibility on. I've tried restarting my PC, restarting the application, opening a new document and copying all of the layers over and nothing works. I've also tried to alpha lock and change the black lineart into a different color but it keeps it in the background even with it being at the top of the layer list and lowers the opacity in the project but not in the layer itself.

Krita

 Version: 5.2.6 (git ab3502b)
 Installation type: installer / portable package
 Hidpi: true

Qt

  Version (compiled): 5.15.7
  Version (loaded): 5.15.7


STEPS TO REPRODUCE
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OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: 
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION