This is missing the most annoying one for me: when I type a search term into safari and it randomly interprets it as an address that it can’t resolve. E.g. “how to bake cookies” gets resolved to how%20to%20bake%20cookies (which safari tries to resolve via DNS or whatever instead of piping it to the search provider). Even better, it’s entirely nondeterministic, though it does seem to be due to some race condition with whatever determines whether it’s a search or a url, and is more likely to happen when typing quickly.
I’d say it happens about 10% of the time I type anything in the search bar. It’s incredibly annoying. Without getting into too much detail, but I confirmed they’re tracking it internally too for close to a decade and are intentionally choosing not to prioritize.