Project 1999 - Items dissapearing after a crash when buying from merchant

I just had a stack of about 15 Opals disappear on me as I was buying some to make change from plat to gems. This happened at about 7:05 PST on the blue sever from the merchant Darfumpel Zirubbel. I was using ctrl and left Mouse click to buy them. the game Crashed as I was purchasing. I purchased approximately 5 gems when this happened and wasn't particularly spamming the buy button. I had an existing stack of 12 before I bought the gems and all were gone when it was over. THis has happened to me before but I wasn't sure of some details so I am reporting this instance now.