I currently have this problem after a system upgrade from 26 to 27.
I have a triple monitor setup, with the leftmost monitor set to "portrait right" (like most people commenting)
My current work around is to align the bottom of my left monitor (in portrait right) to the bottom of my center monitor (in landscape)
If I align the top, so that there are more pixels below my center monitor the "ghost" cursor appears. After some testing, I found that this only happens in "portrait right" and "portrait left" on the left-most monitor. Adjusting the position and orientation on my right monitor doesn't have an affect.
I currently have this problem after a system upgrade from 26 to 27.
I have a triple monitor setup, with the leftmost monitor set to "portrait right" (like most people commenting)
My current work around is to align the bottom of my left monitor (in portrait right) to the bottom of my center monitor (in landscape)
If I align the top, so that there are more pixels below my center monitor the "ghost" cursor appears. After some testing, I found that this only happens in "portrait right" and "portrait left" on the left-most monitor. Adjusting the position and orientation on my right monitor doesn't have an affect.