Haha, I saw a thread a while ago where this happened to someone else in Tribunal, some letter was replaced by "Trundle" all throughout the case. This time it happened to me with the letter P and Ezreal:
Reported by: Ally
sEzrealent first 5 and last 10 minutes of game afk. fed let crazy and has an inaEzrealEzrealroEzrealriate name. Take your Ezrealick
Vladimir[00:00:13] :who mid?
Nautilus[00:00:20] :i am
Vladimir[00:00:39] :if u wanna change tell me before 1:30
Master Yi[00:00:59] :sion can leash or not?
Nautilus[00:01:03] :would you mind just switching outright? is that okay
Nautilus[00:01:17] :thanks a bunch
Sion[00:01:20] :come helEzreal yi
Vladimir[00:01:23] :nvm, glhf
Dr. Mundo[00:01:42] :you mind leashing blue vlad or soraka
Vladimir[00:01:47] :ar sor
Dr. Mundo[00:02:05] :ty
Nautilus[00:02:50] :eve uEzreal here
Nautilus[00:03:23] :toEzreal mia
Sion[00:03:23] :run to me
Nautilus[00:05:28] :ty for cover mundo
Dr. Mundo[00:05:31] :nEzreal
Sion[00:06:01] :omw bot
Vladimir[00:06:13] :mid mia
Nautilus[00:07:19] :toEzreal mia
Vladimir[00:08:01] :mid mia
Sion[00:08:15] :well say something if you need it
Evelynn[00:08:21] :im jg
Evelynn[00:08:28] :****in u
Vladimir[00:09:37] :mid mia
Jayce[00:09:43] :first time soraka ?
Sion[00:09:49] :shes doing fine
Sion[00:09:57] :mid mia
Soraka[00:10:08] :first time jayve?
Master Yi[00:10:24] ://
[00:10:31] :thx for assit soraka
Master Yi[00:11:19] :****ing noob
Nautilus[00:11:25] :toEzreal mioa
Nautilus[00:11:30] :ti incoming
Jayce[00:12:01] :noob toEzreal is gone
Master Yi[00:12:13] ::)noob bot is gone already
Master Yi[00:13:20] :.,
Soraka[00:14:20] :well i got vlad...
Master Yi[00:14:25] :lol cool
Vladimir[00:15:37] :...**** it
Vladimir[00:15:46] :i just disco
Nautilus[00:16:21] :dang yi
[All][00:17:42] :jayec, Ezrealress e + q for most damage
Master Yi[00:20:08] :what the hell r u doing?
Nautilus[00:20:18] :mid first
Master Yi [All][00:21:06] :GG
Nautilus[00:21:11] :they are dumb
Master Yi[00:21:18] :yes Ezrealls
Master Yi[00:21:21] :its finish
Master Yi[00:21:22] :..
Master Yi [All][00:23:51] :WOW
Dr. Mundo[00:23:53] :rofl
Master Yi[00:24:55] :come on surrender
Master Yi[00:24:57] :its over
Master Yi [All][00:25:20] :GG
Dr. Mundo [All][00:25:23] :gg
Dr. Mundo [All][00:25:26] :sorry about jayce
Soraka [All][00:25:27] :gg
Sion [All][00:25:28] :reEzrealort jayce afk and feed Ezreallz
If I had to take a guess, I would say that whoever played as Ezreal (on the enemy team) has a name with invalid characters (something like Ğïáñá ÓP) and it somehow got truncated down to just "P" before being passed to the replace function that swaps out summoner names for champion names in the chat log. Anyone at Riot looking into this?