Android 10 chrome - lazy loading causes course to crash

[olivermartinfoster]

Subject of the issue

https://developer.mozilla.org/en-US/docs/Web/Performance/Lazy_loading#Images_and_iframes
https://caniuse.com/#feat=loading-lazy-attr
https://html.spec.whatwg.org/multipage/urls-and-fetching.html#lazy-loading-attributes
https://web.dev/native-lazy-loading/
https://bugs.chromium.org/p/chromium/issues/detail?id=954324
https://github.com/scott-little/lazyload
https://www.chromestatus.com/feature/5645767347798016

Issues seem to hover around imageready not calling back as loading events are deferred.