'TRIPLE VERTICAL BAR DELIMITER' (U+2980) has inconsistent width, spacing and baseline

[Enivex]

If I do

    \[
        \Biggl\lvert x\Biggr\rvert
        \Biggl\lVert x\Biggr\rVert
        \Biggl\lVvert x \Biggr\rVvert
    \]

the result is

There are three separate issues:

1. The height does not increase (edit: this is covered by https://github.com/stipub/stixfonts/issues/185 )
2. The bars do not have the same width as vert and Vert
3. The spacing between bars is different than for Vert

Edit: A fourth issue is that if I remove the \Biggl and \Biggr I get

As you can tell, the bottom and top of the triple bar delimiter is not the same as for the other two.

[pkra]

https://github.com/stipub/stixfonts/issues/185 already covers this

[Enivex]

185 already covers this

My bad, I searched through the issues, but couldn't find it.

Though that issue does not cover the inconsistencies with bar width and spacing.