Terraform provider 1.15.2 returns 400 on outbound_campaign dialing_mode binding

The 03:00 JST pipeline broke again. State backup confirms it’s clean. Terraform 1.8.4 paired with nice-cxone 1.15.2 throws a 400 Bad Request on nice_cxone_outbound_campaign when setting dialing_mode to progressive. Console shows the resource exists, but the API won’t accept the PUT payload. Tried forcing recreation and adjusting the campaign_schedule block. The provider keeps stripping the max_contacts_per_hour parameter during plan. Logs point to validation failure on the dialing_profile reference. Doing jack all with the debug flag enabled.