I have Vercel Pro with Observability Plus enabled.

According to the Vercel documentation: https://vercel.com/docs/agent/investigation

“An Observability Plus subscription. It includes 10 alert investigations per billing cycle by default.”

However, my Usage page shows $1.56 of Vercel Agent usage deducted from my included Pro credit.

The Agent usage breakdown shows exactly two investigations:

• Usage Anomaly Alert — $0.82
• Usage Anomaly Alert — $0.74

Total: $1.56

I have not exceeded the 10 included investigations. The attached screenshots show that the same $1.56 from these investigations is being counted against my Pro included credit.

Could you please confirm whether this is a billing/metering issue and whether these included investigations should be excluded from Pro credit usage?