I'm tested 1.3.2 update. For 8Gb Polaris hashrate remained at the same level - 1100 h/s. 4GB Polaris lost performance -725 h/s against 762 h/s in 1.3.1. 4Gb Hawaii productive same level - 670-690 h/s.
Nothing is lost, i just lowered auto setup values a little bit, you can set intensity by hand and you will be back again at the same speeds.