Safari (iOS) shows blank pages on Discourse instances after beta 8 due to manually disable IntersectionObserver

Caniuse shows that IntersectionObserver API was added to iOS 12.2 in March 2019.

If those were tested on iOS too, then it also proves it should work - all browsers on iOS use WebKit under the hood.

@MarcP, have you, by any chance, disabled IntersectionObserver in Settings > Safari > Advanced > Experimental Features? It should be enabled by default. (see Safari Technology Preview Release 71 notes)

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