Let's not sugarcoat this: lane markings should not change appearance significantly based on the angle of sunlight. They painted over the old diamond markings with black squares, and replaced them with the helmeted bicyclist bike lane symbol, some time ago, but didn't exactly achieve a Grade A result. You can see in the final picture, shot from directly above, what it probably should look like. I wouldn't say it's a safety hazard exactly, just bizarre. After all these years, and all these miles, and all these streets, they still don't get this right: painting over old markings, putting down new ones. Huh. That's probably what they consider a no-brainer. Except this no-brainer doesn't really pass QC. Thus, I imagine there's a story behind this. This cyclist that gives you a diamond. There's a title in there somewhere about a girl's best friend, but the sunlight struck it at a low angle, and you see the result.
Get up. Go ride.