Hi!
The same problem. I am unable to find my game. Tried to search being logged in and from an incognito page, search by the game name, by the account name, by a tag and by tag combinations. It is especially obvious then you choose 3 tags at once and the result page contains just about 100 games.
It's unfair.
UPD. It's working now. Thanks for your help (even if you didn't do anything)!