On iPhone, the suggestions will appear on presentation (great!), but if you tap a suggestion, then type just a little too fast, the caret position gets messed up.
Do this enough, it'll eventually crash, throwing an exception from some private _UIObscurableTextContentStorage class.
On iPad, hitting search will hide the suggestions.
On iPhone, hitting search does nothing, they just get stuck there. https://mastodon.notsobig.co/@phill/110163933612089969
And this is code pretty much lifted from Apple's own docs. Maddening. https://gist.github.com/phillipcaudell/d7282b58f90c8be7e83c27ce78b6d44a
On iPad, the suggestions briefly show, then vanish. Why? I have no idea! It never used to do that, now it does.
(It also doesn't show the icon, for...reasons?)