Flat and bulky parts with sharp corners are more prone to wraping. It happens because of uneven cooling and shrinking of part. It doesnt mean you have to change orientation because of that, but tune your settings to deal with it. On first layer you can try bit more squish, dont use <0.2 layer height and print slowly, dont use part cooling fan at all. After 2nd or 3d layer you can boost your fan to 100%