librealsense: Inconsistent Accel stream in Unity C#

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Required Info
Camera Model	D455
Firmware Version	05.13.00.55
Operating System & Version	WIN10
Platform	PC
SDK Version	v2.54.2 }
Language	C# Unity
Segment	others

Issue Description

When using the latest Realsense SDK in Unity, I can’t get the Accel data behaving correctly. I have the following snippet:

[SerializeField] RsDevice rs;
    void Start()
    {
        rs.OnNewSample += Rs_OnNewSample;
    }

    private void Rs_OnNewSample(Frame f)
    {
        if (f.IsComposite)
        {
            using (var fs = f.As<FrameSet>())
            using (var poseFrame = fs.FirstOrDefault(Stream.Accel, Format.MotionXyz32f))
                if (poseFrame != null)
                    ProcessGyro(poseFrame);
        }
        else
        {
            using (var p = f.Profile)
                if (p.Stream == Stream.Accel && p.Format == Format.MotionXyz32f)
                    ProcessGyro(f);
        }
    }

    void ProcessGyro(Frame f)
    {
        var x = f.As<MotionFrame>();
        Vector3 v = new Vector3(x.MotionData.x, x.MotionData.y, x.MotionData.z);
        Debug.Log(v);

    }

To listen to Accel data. This is the RSDevice:

What happens is that when the device is enabled, for the first 1-5 seconds, data streams in, and then it keeps outputting the same value. So, new samples do come in via rs.OnNewSample, but the value that’s put out is stuck.

The depth and IR work just fine. In RealsenseViewer, it keeps working too.

No errors or warnings show up in Unity. What could be the problem here?