Many months ago I tested this to see if I could reproduce it. I did on the first try and sent in a bug report at that time. Therefore, you should already have the details from that incident, at least as one example. I don't have the bug report number written anywhere but I kept the screenshots. I kept the item until February or so but after that I figured it was taking up space for no good reason.
As I recall, I bought the base item off the AH already disjuncted and ready to craft so I have no information where the base item originated. The item in question was a melee weapon, a bastard sword, it was of no special material and I did not bother crafting anything besides Keen on it nor putting anything in the Augment slot. I set out only test whether or not Keen was bugged.
This is an image of the item after I first crafted on it in my test. As you can see by the critical threat range in the items details it has Keen crafted on it. Keen did not show up in the item's name nor does it says so in the item description but notably the Cannith Crafting Suffix Slot is missing (filled invisibly with Keen).
I'm not sure if I used the Shared Bank at all on this item. I believe after I crafted it I immediately logged out of the game and logged back on the same character. After the first log out the item appeared thusly in my inventory:
As you can see it became BTC, lost Keen, the augment slot, and the empty cannith crafting slots. It also strangely went from level 29 to level 22, but there is no obvious reason for it to even be that level because its even missing its enhancement bonus.
I logged out and back on one more time to complete the test and then it became a BTC blank item with absolutely nothing on it. I either didn't make or didn't keep a screenshot of the completely zeroed out item.
In case you missed it this was an example of BOUND TO ACCOUNT crafting.