Strange defect on insert on my Tudor 79090

[studioal]

Previous two sellers had not disclosed this, but there is a booger on the 25 marker on the bezel insert. I also noticed the pip is luminescent indicating a possible service replacement. The hands also glow.

Any thoughts on how a defect like this could go unnoticed by Rolex? Is it possible that this insert is aftermarket?

Photos:



Thanks