### Godot version

4.0 Beta 11

### System information

Windows 10 version 22H2, GeForce Game Ready Driver Version 528.02, GTX 1070

### Issue description

Since Beta 11 this error is given whenever a project is run in the forward+ renderer with OpenXR enabled. This error is not present with Beta 10 and previous versions.
![image](https://user-images.githubusercontent.com/38119387/212044209-1179b908-f010-47a1-ae53-bc2faadc30de.png)

I've tested with projects created in previous versions as well as the current version (Beta 11)

### Steps to reproduce

Create project, enable OpenXR in project settings, and run.

### Minimal reproduction project

N/A
ERR_FAIL_COND_V(session == XR_NULL_HANDLE, XRPose::XR_TRACKING_CONFIDENCE_NONE);
	Action *action = action_owner.get_or_null(p_action);
	ERR_FAIL_NULL_V(action, XRPose::XR_TRACKING_CONFIDENCE_NONE);
	Tracker *tracker = tracker_owner.get_or_null(p_tracker);
	ERR_FAIL_NULL_V(tracker, XRPose::XR_TRACKING_CONFIDENCE_NONE);
	if (!running) {
		return XRPose::XR_TRACKING_CONFIDENCE_NONE;
	}
	ERR_FAIL_COND_V(action->action_type != XR_ACTION_TYPE_POSE_INPUT, XRPose::XR_TRACKING_CONFIDENCE_NONE);
	
	uint64_t index = 0xFFFFFFFF;