Doing flip and rolls
Increase rate settings
You must increase rates values before expecting Rattitude to do flips.
Good starting values are 360deg/s or 400deg/s, be sure the rate is not limited by Max Rate limit (set 600deg/s for example)
If you do not, the rate of roll or pitch will make for a large circle, and without a LOT of altitude, you'll perform a "Half" flip, right into the ground.
A little boring video that show Rattitude flips and rolls at Rate mode response = 400deg/s
Go to Configuration > Stabilization tab > Expert tab (please note the Mode transition value is not defined per PID bank, but a global value)
The mode transition refers to the percentage of full stick level where the Rattitude mode switches from attitude to rate.
Default setting is 80%, it can be lowered a little for faster turn in rate mode. Small values are dangerous because they cause flips at small stick angles, keep safe values in 60-80% range. A mode transition value set to 100% act like Attitude mode, vehicle never flips.