The biggest problem with transducres is where to install them.
Air is your mortal enemy. So location is really the MOST important factor of all. Why transducers stop working at higher speeds is air between the transducer face and the water.
I assume you were happy with the old location and the performance it gave you? If it started to lose the bottom at a certain speed, this one likely be very close if not the same speed where it can't see the bottom too.
If you're not happy with the speed it lost the bottom at, consider a new location. Away from the chines that bring in air to lift the hull. And as deep in the bottom in areas that stay in the water as possible. Like near the keel forward of the transom.
Admittedly if you relocate it's more work as you still have the old hole to fill. Or just disconnect it electrically and physically abandon theold transducer in place to avoid having to fill that old hole.
My two cents.

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Capt. Frank