Bug nestable & field-adder do not work together

There is a bug in this version
X

Xon

Guest
The field-adder js isn't compatible with the nestable javascript. This is because field-adder doesn't apply the data-increment-format attribute to the top-level element which is being cloned.

This sort of HTML structure is almost valid but data-id isn't updated so sorting doesn't work as expected.
HTML:

Code:
<div class="nestable-container" data-xf-init="nestable" data-max-depth="1" data-parent-id="">
...
<li class="inputGroup nestable-item"...

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