The PCU Valve was redesigned but who’s to say that a box of old inventory got found in the parts room and the current Parts Crew/Assembly Line Crews may not even know about the original problem.
Gotta wait and see.
I’m old enough to have worked on CNC machine tools with hydraulic servos. In the computer, the motion axis would have a position feedback register, and the program a command register. The difference between them generated a command signal to the servo valve. But if the difference exceeded some predetermined value, a separate valve would close, locking the axis wherever it was. This prevented axis runaways due to a malfunctioning servo valve. I’d want to think that the 737 rudder servo hydraulics would have some analog to that, to prevent the rudder going hard over un-commanded.