Bad rendering for UPA

[brawer]

The UPA sequence i̯ᴖŋk͔ə̑m₍ᴢ̌́t is not readable when rendered by Source Code Pro:

An UPA font renders it like this:

Found by rendering an UPA test page with Source Code Pro. For more broken examples, compare SourceCodePro-UPA.pdf to this. Feel free to improve this test page, just send GitHub pull requests :-)

[pauldhunt]

can you tell me how your sample documents were created? Also, do you know know where the UPA test page might have moved to?

[brawer]

See here: https://github.com/googlefonts/noto-source/blob/master/test/LGC/fontdiff-und-fonupa.html