From the example discussed, the large pink areas may not be a RAW defect at all—they could simply be reflections or flare from an out-of-frame light source, especially if they interact naturally with windows or water in the scene.

However, a few other causes were suggested:

• A bright white spot could indicate a stuck/dead sensor pixel.
• RAW files can reveal artifacts more clearly than JPEGs, since JPEG processing may hide or smooth some issues.
• If the problem appears randomly and inconsistently, partial file corruption from a faulty memory card is also possible.

Good troubleshooting steps:

• Test with a different memory card.
• Compare the same scene in RAW and JPEG.
• Check whether the spots line up with bright reflections/light sources.
• Look for persistent bright pixels in the same location across multiple frames.
• If it continues, contact Canon support.

So the pink spots in your sample may be normal scene reflections, but random recurring artifacts could point to a card issue or a sensor pixel problem.