Web Feature query missing tests with uppercase names?

[gsnedders]

See, e.g., https://wpt.fyi/results/custom-elements?q=feature%3Acustomized-built-in-elements%20&run_id=5090921348857856&run_id=5175870701699072&run_id=6272113188274176&run_id=5839508848508928

i.e.:

curl 'https://wpt.fyi/api/search' \
  -X 'POST' \
  --data-raw '{"run_ids":[5090921348857856,5175870701699072,6272113188274176,5839508848508928],"query":{"exists":[{"feature":"customized-built-in-elements"}]}}'

This doesn't match what https://github.com/web-platform-tests/wpt/blob/c5aa7f3f769e443f25913b085089579f893cf07c/custom-elements/WEB_FEATURES.yml lists.

Notably, this omits:

  - Document-createElement-customized-builtins.html
  - Document-createElementNS-customized-builtins.html
  - HTMLElement-constructor-customized-builtins.html

These are the tests which have uppercase characters in their names, so I wonder if we're just lowercasing them somewhere?