This seems more like a Safari bug than a Postleaf bug, but perhaps we can work around it.

When searching on iOS, the locater results don't appear. They're injected into the DOM and toggling random styles in the inspector makes them magically appear, so I suspect this is a display glitch due to the locater's fixed positioning.

I noticed that this seems to happen on desktop Safari as well, but it's more sporadic. Try searching a few times and it will eventually occur.