Hello,
Noticed another bug in the latest linux preview 2019.2.8f1. It seems the mouse position is always relative to the top left of the window/panel the mouse is over, not relative to the current window that is drawing. That is different behaviour from Windows (have found no evidence that that has changed either).
Here’s a video, the debug line is called from within OnInspectorGUI. Additionally the brush is updated using mouse position and visualizes that the anchor always is the top left (but the offset of the script within the inspector is always respected!).
Best regards,
Seneral