I have no explanation, no apparent cure.
I've been planning to start this wrap for a while, but the yarn was quite happy sitting up in its mothballs. The pattern was quite happy sitting in its file of printed out patterns from the net. Maybe it was the mitred sock squares that got me over excited.
It is going to be fun to finish... The yarn is from a jumper that mum was knitting in the 80s. Fluff gets everywhere.
And, in case that wasn't enough. I have started a project with this yarn several times, I think this will suit it. And I think I know whom it will suit.