The correct term is ventilation (has everything to to with air) but even the "anti-ventilation plate" gets called a "cavitation plate" but the terminology is the same.
May not be the prop and I would be first looking at the
- motor height on the transom and the relation of that "plate" to the bottom of the hull proper
- review the trim angle in relation to the speed when this happens in a turn. When the motor is trimmed out the prop is closer to the surface and more chance of getting aired.
- as well as the design of the hull especially the keel line. If this is on something like an alloy with a keel section that gets tapered towards the stern then that can cause problems in a turn as it can create turbulance and aerated water around the prop.
Cheers, Kerry.