They did?
* https://fred.stlouisfed.org/series/FEDFUNDS
Do people not remember that there were already predictions of an upcoming recession by H2 2019?
* https://www.motherjones.com/kevin-drum/2019/08/the-great-yie...
* https://www.forbes.com/sites/chuckjones/2020/12/31/2019s-yie...
An October 2019 interview with Campbell Harvey, who originally noticed the rate inversion phenomena in a paper he published:
* https://www.youtube.com/watch?v=9sb1byR8Zx0