Symptom
Firepower 7.1 has new feature of "Snort 3 support for intrusion rule recommendations".
The "intrusion rule recommendations" is known as "Firepower recommendations".
However, "Feature Limitations of Snort 3 for FMC-Managed FTD" of Firepower 7.1 includes "Firepower recommendations" in the Intrusion Policy.
"Firepower recommendations" should be deleted from the Intrusion Policy in "Feature Limitations of Snort 3 for FMC-Managed FTD".
Workaround
Ignore "Feature Limitations of Snort 3 for FMC-Managed FTD" of Firepower 7.1 includes "Firepower recommendations" in the Intrusion Policy.