The eyedropper tool is scrolling the document if held down and moved out of the document window.
Create a document and zoom in so the edges are off screen
Select the eyedropper tool
Click in the document and drag the tool (without releasing) out of the document window e.g. to sample from another document
Result : The first document scrolls as soon as the eyedropper leaves the document window
Expected result : The document to remain fixed
PS Version 21.0.2 on Windows 10 v1903 GPU NVidia GTX1080 v441.28