Kraken does not care the issue is between them and Bithumb. Here is what their support said:

"Kieren (Kraken Support)
Jan 25, 23:40 PST

Hi,

As for why we don't post a bulletin that would be unprofessional since the issue at Bithumb would be temporary and we don't block clients from having free will on where to send their funds. It is always highly suggested clients research the exchange they send funds to before they send them.

Support documents: https://support.kraken.com/hc/en-us

Website Status: https://status.kraken.com/

Sincerely,
Kieren
Client Engagement Specialist"

Kracken and Bithumb probably split the stolen XRP. They both are crooks.