Digital messaging webhook 429 clamping outbound pacing at 0.7x on US-East

Outbound pacing clamps hard at 0.7x the second the SMS compliance webhook throws a 429 TOO_MANY_REQUESTS on /api/v2/outbound/campaigns/{id}/digital. Running the 2024-12-18 release, US-East tenant. The admin UI save button spins forever when trying to bump the multiplier back up. Console logs are flooding with DigitalChannelThrottled errors and the queue is doing jack all.