How do search engines treat em dashes in titles?

Question

Google

I noticed that in the search, page titles are cut off after the em dash -. It is an accident? How do search engines treat em dashes in titles?

Answer 1

Try to type in Yandex:
resident is (Found 51 million results)
resident is (Found 54 million results)
And the issue itself is different.

Answer 2

No way

Answer 3

It is correct to use an em dash in the text format, so in the output with an em dash, sometimes there is more result. The same wiki uses a dash, not a minus.
To crop a header, you need to crop it.
Need examples, I don't think the search engine catches this symbol. Maybe the bydlokoder of the search engine compiled a crooked regular expression, clearly registered the signs, where he did not include a dash. Again, it's hard to say, examples are needed, I have not seen this.