some pictures does not show transparent boxes

[Mystogun]

This is the image I'm running the model against

Original Image

I use this code

using var platesPredictor = YoloV8Predictor.Create(platesModelPath);
var plateResults = platesPredictor.Detect(new ImageSelector(pictureBox3.ToImageSharpImage()));
using SixLabors.ImageSharp.Image detectedPlateImage = pictureBox3.ToImageSharpImage();
pictureBox6.Image = new Bitmap(new MemoryStream(plateResults.PlotImage(detectedPlateImage).ToArray()));

and this is the plotted image

Image after plotting

it looks like the boxes are not transparent

I tried to solve it by doing this

using var platesPredictor = YoloV8Predictor.Create(platesModelPath);
var plateResults = platesPredictor.Detect(new ImageSelector(pictureBox3.ToImageSharpImage()));
using SixLabors.ImageSharp.Image detectedPlateImage = pictureBox3.ToImageSharpImage();

var detectionOptions = new DetectionPlottingOptions();
detectionOptions.ColorPalette = new Compunet.YoloV8.Plotting.ColorPalette("ff000010");
detectionOptions.BoxBorderThickness = 1;

pictureBox6.Image = new Bitmap(new MemoryStream(plateResults.PlotImage(detectedPlateImage, detectionOptions).ToArray()));

it plotes this image, but there are no borders nor labels and confidence

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but the same code(the one without the detectionOptions object) works fine with other pictures
like this one

yet the boxes on some other pictures are not transparent

[dme-compunet]

it plotes this image, but there are no borders nor labels and confidence

Indeed there are labels and borders, but they are not visible due to the poor quality of the image.

A possible solution is to create a canvas of an empty image in the dimensions of the original image (but of a higher quality), draw the blurred image to the canvas and then draw the predictions to the image.