Fuji X-Pro2 - Sensor surround imperfection

Hi everyone,

i seem to have an issue with the sensor on my newly acquired Fuji X-Pro2.

There seems to be some sort of marking underneath the image sensor.
This does not seem to affect the image quality, however, i find this kind of odd and was wondering if anyone has the same kind of marking on their X-Pro2?

I attached an image of my sensor with the marking highlighted in red.

Thanks for your input!

Thomas

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