OK so this doubling is confusing to me. It is most likely MD, but It is not shelf like... it actually ends up standing as tall as the devices at it's high points...
It is strange... it is going on on all devices on OBV, but this was most prevalent on these devices, and didn't want to overload post with pics of MD for no reason! HA!
It IS MD, your lighting is playing tricks with the depth appearance. Motion is toward the NE on all devices and is reducing the device slightly. MD can be all different kinds, motion, direction, multiple times and ways, just haow many factors can you put into the error? There is a lot of die wear going on, this may effect the edges and how they "grab" the device, not being as sharp as earlier die states.
Looks like the die is ready to be retired or polished as is...
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