Cannot select buttons using Simulator in AR Mobile Template

Steps to reproduce:

1. Use Unity 6000.0.80f1  or later to make a new project from AR Mobile Template, or used the repro project attached.
2. Project Settings > XR Plug-in Management > XR interaction Toolkit > enable Use XR Interaction Simulator in scenes.
3. Enter Play Mode. 
4. Mouse pointer icon indicates right controller.
5. Left-mouse-click on the Continue button; nothing happens. 
6. Position the mouse pointer on the Continue button and press T for trigger; nothing happens.
7. Exit Play Mode. In Hierarchy, disable Coaching UI and Greeting Prompt, but enable Options Modal. 
8. Enter Play Mode. Hold down the right mouse button and drag around to rotate your view until you see planes, and grids of dots indicate that the planes have been detected by AR. 
9. Left-mouse-click the Visualize Surfaces toggle. The dots grids do not vanish and the toggle does not disable.  Try the T key – no effect.
10. Left-mouse-click on detected planes to place some cubes. 
11. Try the Remove All Objects button. Your spawned objects remain. 

Actual results: 

UI buttons cannot be activated via XR Interaction Simulator input.

Expected results: 

XR Interaction Simulator should be able to active UI elements.

Reproducible with versions: 

Unity 6000.0.80f1 + XRI 3.5.1

Unity 6000.3.20f1 + XRI 3.5.1

Unity 6000.7.0a5 + XRI 3.6.0-pre.1

 

Not reproducible with versions: 

Can’t test with versions: 

Tested on (OS): 

MacOS 26.2.1

Notes:

• Flagged as a regression; pretty sure this worked at some point in the past.