Description
In the current Flatpak build of Pinta 2.1.2 altering the curve shape in the Curves adjustment window by dragging it with the mouse is broken.

To Reproduce

• install Pinta from Flatpak
• Open or create image
• Select "Adjustments => Curves..."
• Left-click onto the curve and move mouse to drag.
  => curve is not bent while dragging, remains fixed

Additional Info

Version
Pinta 2.1.2 (Flatpak) on Linux Mint 21.3