This is a tough one, its to do with how PG is parsing strings and is not title specific…
It sees the string and treats it as a URL path … so the only entry in search is /example/1235
Only simple workaround I can think of is stuffing a few more words for search into the body of the post.
Changing it so we manually split everything up has other downsides.
For example if I add example/1235 into the post body … it will will now be something you can find.