Tbf getting all of the engineers and leadership online to figure out what is going on, write and authorize a public statement is a pretty quick turnaround
EDIT: looks like a scaling issue. Refreshed the page and balance reappeared. Refreshed again and it is gone, but the chart below with the balance history still has correct data.
Edit: Entirely theoretical, but I wonder if there's a bank-run sort of threat for a financial institution getting communication about a system like this wrong enough.