The "Meow T-Shirt" which is a donor item will disconnect you when you try & put it into your cash shop inventory.
Are your files up to date? Just like Matt I am also unable to replicate the bug you've reported here.
Re-downloaded just to make sure it wasn't that quick & wasn't because I noticed another update on the 20th, past what happened on the 19th. The item is on my character "Sarcastic"
More info: I usually dc as well when putting items that weren't originated from the cash shop, into the cash shop. EX: Halloween umbrella, Halloween mask, tedtacular bearington.
More info: the same thing happens when i try to store santa beard (tried 3-4times same thing happens). However, when I store other event nx such as halloween umbrella and santa overall, there is no issue.