Not only was the FBI lying to the FISA Court, they were lying to the Department of Justice as well.
Later the DoJ figured this out and decided to go in on the hoax, but at first they were mislead by the FBI.
The Epoch Times produced this great video explaining how it was done.
🔵 Durham Analysis: https://www.theepochtimes.com/new-doj-notes-reveal-fbi-panic-after-trump-tweeted-he-knew-he-was-being-spied-on_4455950.html
🔵 Meeting Notes: https://storage.courtlistener.com/recap/gov.uscourts.dcd.235638/gov.uscourts.dcd.235638.123.1_1.pdf