How many laps on the CrO strop? How much pressure.
I 've had similar problems when I was still using CrO. (I did a 30+ laps with a firm drag)

I now get at least a dozen shaves out an edge, before it starts to duck my expectations (although it's still perfectly shaveready at that point)

Could you describe your most typical honing progression?

I 've been where you are. We'll figure it out.

Bart.