Spotlight Search, when I start to type, it changes from a single-line text field to the real-time search results.
In the left, between the bar and the "Top Hits" search results, it says "Indexing..." and displays a full horizontal bar.
This never advances (it looks full), and it never finishes.
The search results are not correct since this started happening.
I was suffering from the Safari 12 -> Spotlight Search display disappears while typing problem, and I've turned off the Safari indexing already.