Damn, I think this is not a hack but an exit scam, the site does not have a good reputation anymore, I hope I'm wrong but I believe getting into exit scam is more probably than being hack.

https://www.coindesk.com/livecoin-crypto-exchange-hack

Question is, why it happened at this time?

Maybe they should be investigated so people will get their money.

Their account is not anymore active - https://bitcointalk.org/index.php?action=profile;u=462136.. so I don't think we can expect some reply from them.