Rendering transparent pixels to BufferStrategy/BufferedImage cause bleeding/not updating

Question

I honestly cannot find an answer to the problem I'm having. I'm making a game engine with Java and I have a function called render:

public void Render() {
        List<List<FramePart>> cachedBuffer = new ArrayList<List<FramePart>>(buffer);
        if (cachedBuffer.size() <= 0) {
            return;
        }
        List<FramePart> toDraw = cachedBuffer.get(0);
        if (toDraw == null) {
            return;
        }
        if (toDraw.size() <= 0) {
            return;
        }

        BufferStrategy bs = frame.getBufferStrategy();

        if(bs == null){
            frame.createBufferStrategy(4);
            return;
        }

        image = create(frame.getWidth(), frame.getHeight(), true);

        Graphics2D g = (Graphics2D) image.getGraphics();
        Graphics2D graphics = (Graphics2D) bs.getDrawGraphics();
        WritableRaster raster = image.getRaster();
        graphics.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));
        for (FramePart part : toDraw) {
            if (!part.isText) {
                try {
                    if (part.processedData != null) {
                        int[] data = part.processedData;
                        raster.setPixels(part.x, part.y, part.w, part.h, data);
                    } else {
                        for (Pixel p : part.partList) {
                            if(p.color.getAlpha() > 0){
                                float[] pixels = new float[] { p.color.getRed(), p.color.getGreen(), p.color.getBlue(),
                                    p.color.getAlpha() };
                                raster.setPixel(p.x, p.y, pixels);
                            }
                            
                        }
                    }
                } catch (ArrayIndexOutOfBoundsException e) {
                    //e.printStackTrace();
                }

            } else {
                g.setFont(part.renderText.font);
                g.setColor(part.renderText.color);
                int x = part.renderText.x;
                int y = part.renderText.y;
                if (part.renderText.offset) {
                    FontMetrics fm = g.getFontMetrics(part.renderText.font);
                    x -= fm.stringWidth(part.renderText.s) / 2;
                }
                g.drawString(part.renderText.s, x, y);
            }
        }

        graphics.drawImage(image, 0, 0, frame.getWidth(), frame.getHeight(), null);
        graphics.dispose();
        bs.show();
        Toolkit.getDefaultToolkit().sync();
    }

It gets a list of FrameParts that need to be rendered. These either have text or pixels that need to be rendered. The problem occurs when I use transparent pixels (from a texture I load in). It makes the pixels that are transparent not update, causing this effect:

Does anyone know what I am doing wrong?