This has been occurring for a few weeks now, when I click a link to the observation mentioned in the [iNaturalist] New updates YYYY-MM-DD email, it results in an incompletely loaded page:
Links to users still completely load, as do links to things like “View all of your observations from…”
Sometimes the loading icon is a bit different:
The species information does load on the tab, however:
iPhone 7, running iOS 13.3