The preview swatch doesn't show anymore when color picking on canvas 

Nothing special to do. I just color pick and observe the absence of the 2 little preview and current color swatches
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My Sys info:

Krita
  Version: 4.4.3-alpha (git 3740597)

Qt
  Version (compiled): 5.12.9
  Version (loaded): 5.12.9

OS Information
  Build ABI: x86_64-little_endian-lp64
  Build CPU: x86_64
  CPU: x86_64
  Kernel Type: darwin
  Kernel Version: 20.2.0
  Pretty Productname: macOS 10.16
  Product Type: osx
  Product Version: 10.16


OpenGL Info
 
  Vendor:  "ATI Technologies Inc." 
  Renderer:  "AMD Radeon Pro 560X OpenGL Engine" 
  Version:  "4.1 ATI-4.2.13" 
  Shading language:  "4.10" 
  Requested format:  QSurfaceFormat(version 3.2, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile  QSurfaceFormat::CoreProfile) 
  Current format:    QSurfaceFormat(version 4.1, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8, samples 0, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile  QSurfaceFormat::CoreProfile) 
     Version: 4.1
     Supports deprecated functions false 
     is OpenGL ES: false 

QPA OpenGL Detection Info 
  supportsDesktopGL: true 
  supportsOpenGLES: false 
  isQtPreferOpenGLES: false 

Hardware Information
 Memory: 32 Gb
 Cores: 12
 Swap: /private/var/folders/4t/xdmnfpwn7sn97qp1ygb9cwkw0000gn/T