We have Heo Joon Suk actor here: https://www.tvmaze.com/people/116908/heo-joon-suk
He has various AKAs as many such actors do, but this is the first time that the engine didn't match them when I tried to add him as a guest cast.
I tried adding "Heo Joon Seok" under guest cast, and he wasn't listed (though many others that don't match the name were). At the time we actually had him twice (I'm since merged him into single actor).
Even if in a regular search you enter "Heo Joon Seok" he won't appear until page 3. What's weirder is that first two pages will list people that don't even match that name at all.
@david I guess in general search engine this comes to how things are prioritized, but when adding an actor to some show, adding him under one of his AKAs should always list him for selection at least. That is the bug I am reporting here.