As stated in the title, Monarch Kog'Maw's display name during Loading Screen and on the In-game Scoreboard is shown as Game_character_skin_displayname_kogmaw3 (or something similar). I do not own Monarch Kog'Maw so I cannot reproduce the bug, but someone who does own him may be able to.
I own the skin and can confirm this after two games with him. Don't have a replay/screenshot, sorry.
I get this same behavior every time there's a kog in the game... regardless of skin. It seems like they store a list of character skins, and then theres a table that holds all of the "friendly names" of those champions... this particular skin/champ is missing that connection to the friendly name.
Are you using a Mac by any chance?
This bug is with every single kog'maw skin (even default) and for every player, and even when the kog'maw is a bot he has a weird name.
I have noticed this as well. I just did an aram and it happened again. I took a screen shot.
