I don't know exactly when it started, but I think I first noticed it a month or two ago. When I'm doing the daily woodcrafting writ on my characters, when the daily is the 3 staves, the ice staff seems to get skipped by whatever process is putting the arrows on what to do. I turned off all addons and did /reloaduo before taking the attached screenshot. It clearly shows on the left side that I haven't yet crafted a staff, but on the right there are only 2 staves with the arrows - as it turns out, the lightning and inferno. The ice staff seems to be being ignored.
When I first noticed it I thought maybe I'd run out of materials, but when I unchecked the "quests only" box I was able to craft the ice staff and complete the writ. And as you can see in the screenshot, I have sufficient material to craft all 3.