Does your Surface Pen have a button you can set to Right Click with Microsoft software?
I wrote I disable Microsoft's pen and touch Press and hold right click for IMO it hurts Photoshop brush Performance. I see that Adobe also suggest that you should disable this Windows feature tablet support faq photoshop It seems that Press and Hold Right Click does not get along with Photoshop. Reading between the lines I do not think that Adobe will be addressing this issue they show disable this. Windows Press and Hold Right Click will remain incompatible with Photoshop any may hinder Photoshop's operation. A windows feature Adobe will not use or support in Photoshop.