This is not surprising.
People are struggling, and their assessed property value often is well over market rate, so it is no surprise that a rapidly growing industry is evolving to help people challenge property tax assesments, particularly among people attempting to sell their homes.
The fact that one has successfully lowered the taxes makes the home more salable.
Of course, it’s going to devastate the tax revenues of municipalities just as an economic downturn increases demand for their services.