I was transferring aprs from my shad PvtKalia to my Sair PvtExusiai at )2:25 Server time. I was transferring 30 aprs and successfully looted 6 of them before my clients appear to have lagged. I was unable to loot or drop any items on any of my 3 clients PvtKalia, PvtExusiai, PvtMudrock. I tried to reconnect my sair's client before they despawned but I got an error message saying this user is already logged in. I don't know if there is anything to do to verify or correct it but at least wanted to report the issue.
You should post a thread in the Character Issues section and see if staff will refund you. Unfortunately this is arguably a risk you assume from drop trading, so I can't guarantee whether staff will refund you or not.