Subaru outback CVT

none of this is correct

1- when in manual I have to use the paddles to shift up and down.

2- when in D the display shows “D” when I down shift for example to 5, the transmission stays 5 for about 20 - 30 seconds and then returns to “D”, so it looks like it acts like its in Manual mode for those 20-30 seconds; during that period when I step on it the transmission does NOT downshift but stays in 5 which means I have no power and the car accelerates very sluggish, after that period the the display goes to “D” again and the car accelerates normal