The crouching feature activation does not work in version 5.6.0 due to the change of sequence from previous versions of stacking in the “components” section of the First Person Character BP. In version 5.6.0 the Camera is a child of FPMesh which is a child of the Character Mesh which is a child of the Capsule Module. Crouching works again if FPMesh is a child of the FPCamera which is a child of the Capsule Module.
