SGOV yielding more than FLOT? Meaning TBills yielding more than short-term investment grade corporate bonds. Confused...

Anyone have any insight?

I typically store my cash reserves (when waiting for deals to arise) in FLOT, as it generally yields a touch more than TBills with minimal additional risk.

For the past handful of months FLOT has underperformed TBills majorly.

Can anyone provide reasoning? Will it continue this way with underperformed and is going to TBills more prudent? Or is this just a short-term ordeal due to the market sell-off?