Upbit warned on Nov 6 that GOPAX deposits, withdrawals and trading appear temporarily halted, and said it is monitoring the situation and may restrict crypto withdrawals to GOPAX to protect investors, with further changes to come by notice. Upbit notice
It links two GOPAX notices on the halt and reminds users that completed withdrawals cannot be cancelled, so check GOPAX deposit support, address and network before sending.
Bithumb issued a same-day notice titled "Withdrawal caution for GOPAX exchange," flagged at 09:30 UTC by CEX Alerts. Its full page text was not retrievable.
GOPAX told Digital Asset the halt was a preventive step after an in-house hacking threat email, not a hack, with no hack attempt so far, and said withdrawals remain possible via separate request to customer support.