our neighbor upgraded to 9.5 also and the problem went away, i’d say somethings changed with the timing, and the frame spreading is NEEDED for us, we had customers work fine for days, then just wouldn’t see our AP for hours or even days, and then magicly they would be back… same issue would happen for our neigbors we switch to frame spreading and the problem went away for both of us,
i don’t see any abnormal bit errors, or any desernable slow down on those APs compared to others.