Reflection system not picking up changes in c++ code.

Downloaded Unreal Engine 5.5. I am running on ARM 64 architecture.
Installed new Top Down c++ project template.

When I add data items to the PlayerController they are not reflected in the engine.

I copied the following line:

/** Time Threshold to know if it was a short press */
UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = Input)
float ShortPressThreshold;

And added a 2:

/** Time Threshold to know if it was a short press */
UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = Input)
float ShortPressThreshold2;

ShortPressThreshold shows up in the editor ShortPressThreshold2 does not show up in the editor.

The reflection system is broken.