Mouse Input for MRTK UI not working in built .exe

[halfpasttense]

Any UI built with MRTK UX components appears to work with mouse input only in the Unity Editor, but stops working completely when built and ran as an exe. Is this the expected behavior? Is there any way around this? I need to reuse some of the UI I've built using MRTK for a desktop windows application as well, so I need it to work with mouse input.

[AMollis]

@halfpasttense , is this a question about MRTK2 or MRTK3? Are you running the EXE on HoloLens or just the PC?

[AMollis]

Also...desktop is not an officially supported platform, so your milage may vary. MRTK3 targets OpenXR headsets and is primarily tested on HoloLens 2.

[halfpasttense]

Yeah everything has the UGUIInputAdapter, so I'm not sure why it's not working. If I use any regular Unity UI components in the same project, mouse input works fine on them. It's just all the MRTK3 UI components that don't work. I'll try that example you mentioned and see if that works for me when compiled to exe.

[AMollis]

Also, to confirm, is your scene setup with the default MRTK XR Rig prefab? This prefab contains all the necessary MRTK3 interactors.

[halfpasttense]

We figured it out after looking for differences between our project and the HandInteractionExamples demo project. What breaks mouse interaction with UI is having the "Hand Tracking" OpenXR Feature Group enabled for Windows platform. Turning this off makes mouse interaction with UI work.