I have had this issue repeatedly and lost both coins and runes. I received the same canned response. It happened again and they sent me an accounting of my coins coming and going. The only thing that seemed to be missing was possibly some guild treasure chests. It is hard for me to tell how much I am actually spending in the rune temple but I am pretty sure I am losing coins and runes still every time I get that disconnect. It is a common issue and the "client" is Tynon code and should be fixed to work properly with the server.