This is not the final website. It is a demo of the real tool working, made for Y Combinator.
AxisRemedy

12-001 Stretched characters are not represented appropriately.

Stretched characters such as brackets and radicals are not represented properly.

Checkpoint
12: Stretchable Characters
ISO 14289-1 (PDF/UA-1) clause
7.2-4
Test type in the protocol
Needs a human judgement
Applies to
A single object

How AxisRemedy handles it

Left for you. A person has to judge this one. AxisRemedy does not test it; the report lists it as left for you.