Some features are not rendered when using ?feats query param and multiple features

[imagoiq]

When I'm listening features from ES2019 or ES2018 by clicking the link "Feature support list". Some features are not rendered and I'm getting Uncaught (in promise) TypeError: can't access property "chrome", e is undefined in my console on Firefox or Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'chrome') in my console on Chrome. Looks like an issue in the web-component logic.

The very same features, for example JavaScript built-in: Function: toString: Implements Function.prototype.toString revision, work flawlessly when being alone on a page.