2018 P WDDR-005 Jefferson Nickel Find!

I don't believe WDDR-005 is a doubled die at all.

1. It doesn't match the shape of the L. L has rounded corners, the "doubling" has sharper corners.
2. The way the "doubling" tapers off is unusual for a doubled die. Doubling caused by a doubled die typically fades away at the edges and soft rounded ends. This one ends at a sharp point at the bottom.
3. There are no doubled dies with this kind of isolated doubling so far from the center of the coin known on nickels.
4. How common are tripled dies on modern coins? Very rare. What are the odds that a tripled die (rare in and of itself) also happens to be isolated doubling far from the center of the coin (Impossible, if not extremely rare).

It doesn't look like a doubled die and it is extremely unlikely to be one due to the type of doubling and its location on the coin. I think these are just coincidental die gouges just like the ones above the building.

Still an interesting coin and a neat find, but I doubt it's a doubled die.

Well it is a Wexler listing. I feel it is a doubled die. It has the shape of the hub mark on it twice. So during the creation of the die, the hub was moving into the correct alignment and finally snapped into place. If it didn't look like part of the design, then I would agree with you, but it does copy the hubs design. While it looks like such a big thing, actually to the die hub alignment, the hub movement is minor. (We forget we are looking at it through a microscope) The lines are die scratches, not die gouges. They remain strongest, closest in on the devices, weakest in the open fields. Even stronger inside of contained devices and bays.