Bulb has light dark shade around glass

My yeelight YLDP06YL has light dark shade around the glass visible mostly when dimmed with white colour. Very hard to take picture as bulb is inside an enclosure. Can someone who can test by putting in an open holder check and confirm. You can see it clearly. It’s a bit hard to explain but I’m sure if its in all the bulbs someone else will notice it too . It’s not in my hue bulbs or other standard led bulbs and I never noticed in the older generation of color bulb which I don’t have anymore.

Here’s a picture I just took and you can clearly see what Im talking about. Its not that bad in reality and almost goes away on full brightness. Can others please check and confirm, might be normal.