Sticker Stain

[Charles]

Just dried a load of Walnut it went in at 20% mc. When it was done drying I got a very slight sticker stain which I have never gotten before.
My stickers are spruce and I have always used them with other species with no problem.
I have another load of Walnut to go in and I am wondering if I should cut some of the dried Walnut up to make some Walnut stickers.  Any suggestions would help.

Charlie