It's confirmed now, they do it intentional and there are no technical issues at all.

I did another withdrawal of a small amount of 1.6 BTX to the same address. This went through. Another withdrawal of 220 BTX is stuck in "processing" for almost a week now. They keep higher balances artificially stuck in either deposits or withdrawals and are collecting the airdropped dividend of 6% every Monday, I have no longer doubts about this. The same is the case for DeepOnion which pay around ~3% in their "airdrop" every Friday. Shame on you, Cryptopia. You are thieves and it is proven now!!!