RX 560 2Gb
1.6.8 - 526 h/s
1.6.9 - 490 h/s

have no fear, just report here

Anyone with 4gb 560 can report a change in hashrate?
I have only 4gb card and there nothing changed from 168->169 when testing.
You changed something that makes 8gb cards to do better hash rate but worst for 4gb & below, at least in some cases.