The Qora wallet is not broken. Its just not completely stable. For you and me this is not too much of a problem (we can resync or recover from seed), but don't forget that Poloniex has about 80 other coins listed that each have their own client problems so I can imagine Busoni doesn't have the time to look at the Qora block explorer 24-7 sipping kool-aid and smoking a big cigar. The fact that Sharexcoin bought their webhosting at Walmart also doesn't help.
So if your deposit or withdrawal is stuck. Chill out and open a ticket. They will get back to you as soon as they can and fix it.
Meanwhile: go buy some Qora on Poloniex so the trading volume makes sure its worth Busoni's while.
People if you dont want to lose your coins dont buy it from poloniex ,i opened ticket a week ago when i didnt get my coins credited to my qora acc nothing is solved and it looks that they are looking for every oportunity to steal my coins