Beats me, but JP Morgan Chase has paused withdrawals for me too. They say "You have reached your daily $5000 ATM withdrawal limit" and "Bank hours are 9 AM to 5 PM Monday through Friday".

"Trust us, you can withdraw your money! Or don't trust us! It doesn't matter because you have no choice but to look at your bank balance until we deem it advantageous to allow you to withdraw to real money!"