what should happen: the cursor should return to its original column
what does happen: the cursor returns a line above its original position. It may also return in the wrong column (with one window, it returns to the first column; in the left window of a vertically split frame, it retains the correct column).
notes: Pressing PageUp, then PageDown also gives an incorrect result, although it seems less predictable.
When a window has evil-tabs' tab bar at the top,
scroll-preserve-screen-positionloses track of the line number.(setq scroll-preserve-screen-position 'always)