Scroll rect works with touch but not pen on android

I am having trouble sorting this out. I have a simple project with only a scroll rect, its content and some items in the content. It scrolls perfectly and as expected in the editor and when built for android it works with touch but it will not react at all to the s-pen. I have done some more testing and it seems the s-pen registers as mouse input, which is what I found stated in another post. My question is how to get the scroll rect to scroll with both touch and s-pen (mouse) input?

To add to this, the s-pen can interact with basic UI buttons so they process the s-pen (mouse) input on mobile but the scroll rect does not. This leads me to believe the issue lies with the scroll rect itself. Why the scroll rect reacts to mouse input in the editor but not on mobile build seems to be the issue.

Any insight into this would be appreciated. If anyone else has encountered this and found a solution I would appreciate knowing what it was. Thanks in advance.

I am having the same issue. Samsung releases an SDK specifically for the spen and I am trying to get it integrated, but forums searches are 5+ years old. I’ll update you if I figure it out.

Maybe Unity Issue Tracker - [Android] Input.GetKey returns false when S-Pen is being used on Samsung device ?