SecurityHub member accounts stuck in "Enabling in process" for over a day

I delegated management responsibility of Security Hub from my Control Tower management account to another account and, using a user with admin privileges in that account, enabled Security Hub, auto-enrolled new accounts, and clicked "Enroll" to enroll all existing accounts in my organization. For over 24 hours, all of those accounts have been stuck in a "Enabling in process" status. Is there anything I can do to resolve this? I feel like it shouldn't take this long to enroll member accounts.