Firebase system limit 50k read while blaze plan

My Cloud Firestore is on a Blaze billing plan but is being restricted by the free tier system limit of 50,000 reads per day. The quota shows as “System limit” with “Adjustable: No” in the Quotas and System Limits page. The project is pay-as-you-go and reads beyond 50,000 should continue as billable usage rather than being blocked.