Ask HN: Any AWS billing issues known? Amazon forecast of 3 billion dollars

I receive an AWS Budgets alert that my budget is exceeding the alert threshold. Threshold is 5$. Forecasted amount is listed as $3,005,575,870.47. (Yepp, right, that’s 3 billion dollars.) I haven’t even used AWS actively in the last year, but AWS console lists the amount as stated above. No feedback from AWS support yet, but the support AI chat bot says: “Die perfekt gleichmäßigen Tageskosten seit dem 1. Juli deuten stark auf einen Abrechnungs- oder Messfehler hin.” (“The perfectly consistent daily costs since July 1 strongly suggest a billing or metering error.”) Bot created a support ticket (or at least told me so). Anyone else seeing something like this?
Already disabled all AWS IAM roles and deleted all other AWS resources I know of. AWS login not hacked as far as I can tell. But owing Amazon 3 billion dollars is a bit of a concern.
Any ideas?