Just tried the October 1st update and dual screen is still broken on Surface Duo. Such a ridiculous bug that shouldn't be lasting through multiple updates. UPDATE: Jan 20 update and the single screen only issue persists. I am very disappointed. UPDATE: Feb 1 issue persists, I'm not even sure what was actually updated because this marketed dual screen function is gone and remains the focus of my attention. UPDATE: February 18 no change. UPDATE: March 10 no release notes and still single screen