I have an antique Old Gold strop with both leather and silk webbing sides. After I hone a blade I only strop on the leather side and any other time I stropped on both the webbing and the leather. I was also finding that I was having trouble with good edges becoming dull rather fast with a lot of discomfort.

So anyway, I have come to the realisation that the webbing side of my strop may have been treated with some form of abrasive at some stage.
And then last night I tried stropping only on the leather and I got a great shave.