Input Actions Editor "Invert" Processor is a foldout even though it does not contain any properties and does nothing when opened

Steps to reproduce:

1. Create a new Unity project using a 3D Universal Template
2. From the Project window, open the "InputSystem_Actions.inputaction" asset
3. Create a new Action Map
4. In the Action Properties tab, click on the "+" button next to Processors
5. Select "Invert"
6. Click on the "Invert" foldout
7. Observe the "Invert" foldout

Actual results: Foldout animation is played but nothing is opened, since it does not have any properties

Expected results: "Invert" Processor should not have a foldout, since it does not contain any properties

 

Reproducible with versions: 1.8.0 (6000.0.0b11) 1.17.0 (6000.0.63f1, 6000.2.14f1, 6000.3.0f1, 6000.4.0a5, 6000.5.0a2)

 

Tested on (OS): macOS 26.1 (M1 Pro)