Face detection isn't working on Asus device when trying to pass image from camera 2 API to detector

Question

I am trying to use MLKit in my app for face detection. I am using Camera 2 API to get the image from image reader and pass it to the face detector for processing. This works very well on devices like Motorola, Readmi, Realme and, also most of Samsung devices but fails on Asus. I checked the log and found out that

setOnImageAvailableListener

is called only once instead of calling for every frame.

Attaching my code snippet below.

imageReader = ImageReader.newInstance(
           480,
            640
            ImageFormat.YUV_420_888,
            2
        )

val previewSurface = Surface(texture)
        mPreviewBuilder!!.addTarget(previewSurface)

val recordingSurface = imageReader?.surface!!
mPreviewBuilder?.addTarget(recordingSurface!!)

mCameraDevice!!.createCaptureSession(
            listOf(previewSurface, recordingSurface),
            object : CameraCaptureSession.StateCallback() {
                override fun onConfigured(@NonNull session: CameraCaptureSession) {
                    mPreviewSession = session
                    updatePreview()

            val realTimeOpts = FaceDetectorOptions.Builder()
            .setContourMode(FaceDetectorOptions.CONTOUR_MODE_ALL)
            .setPerformanceMode(FaceDetectorOptions.PERFORMANCE_MODE_FAST)
            .enableTracking()
            .build()

        detector = FaceDetection.getClient(realTimeOpts)

 imageReader?.setOnImageAvailableListener({ reader ->
            if (isProcessing) return@setOnImageAvailableListener
         
            reader.acquireLatestImage().let { image ->
                try {
                    isProcessing = true

                    synchronized(processorLock) {
                        // Real-time contour detection

                        detector?.process(
                            InputImage.fromMediaImage(
                                image,
                                getRotationCompensation()
                            )
                        )?.addOnSuccessListener { faces ->
                            // Task completed successfully
                            // ...
                            for (face in faces) {
                                val faceGraphic = FaceGraphic(graphicOverlay, face)
                                if (faces.isNotEmpty()) {
                                Log.d(TAG, "Face detected!")
                                }
                            }
                     
                            isProcessing = false
                            image?.close()
                        }
                            ?.addOnFailureListener { e ->
                                // Task failed with an exception
                                // ...
                                image?.close()
                                detector?.close()
                                isProcessing = false                          
                                e.printStackTrace()
                            }
                }

                override fun onConfigureFailed(@NonNull session: CameraCaptureSession) {
               
                }
            }, mBackgroundHandler
        )

Anyone having Asus device can please confirm if they are facing similar issue.

• Phone make and model: Asus Zenfone Max M2
• OS version: Android 9