Blizzard is aware of a bug that’s causing items to get stuck in invalid listings. A fix for the issue is coming within the next 2-3 days.

(Source)

We’re aware of a bug that is causing some items to get stuck in invalid listings.

This is a priority for us to fix, however, we expect the fix to take 2-3 more days.

We’ll let you know as soon as the fix is deployed.