I have been checking items and unslotting augments to update them. Everything that was already in my inventory had augments listed and was fine. When I started looking at the items (helms, necklaces, cloaks, rings, etc.) in my character bank, I noticed they did not list any augment slots (e.g. Many-hooked greaves with no augment slots listed) unless there was already an augment slotted on them, and then, only that augment slot would show even if the item had 2 augment slot (e.g. Sightless showed a blue augment with a sapphire slotted in it, but did not show the empty green augment slot at all).
I literally had to drag all the items from my character bank to my inventory, relog the character, and then the augments showed up again.
Perhaps this could use a fix, or players should know this is happening to avoid panic in the forums
Edit: the same issue is happening to shields, armors and weapons