withdraw 18 BTC to my wallet pending > 30 minutes

How long time to process it?
Last time, it still 1 minute
Usually it's included in the next block. You got it already, don't you?
Their hot wallet might be empty. I have waited over 1 hour already...

LTC withdrawals have been taking 4-6 hours for the last 2 days (where they were previously instant).
It *could* be a hot wallet issue I guess, but I doubt they'd leave the hot wallet empty for so long.