[Chat] Serious chat display bug - chat unusable for entire match

In game, muting a player whose name begins with either "b " or "i " results in bugged chatbox behaviour for the duration of the match. The "i " case makes all chat for the rest of the match appear italicized, while the "b " case results in every chat message becoming invisible for the rest of the match. Unmuting the player does not remedy the problem. Pressing Z (or whatever your hotkey is to display a bigger chat history) will make some text reappear while other text disappears, seemingly randomly.

The game appears to be processing the summoner name as a markup tag. We tested other common HTML tags (s, sup, marquee, and embed) which yielded no results.

Demonstration video

Reproduction steps:

1. Create a summoner whose name begins with either a b or an i, and then a space. My test account was named "b test ha ha ha"
2. Join any game
3. Have an opponent or ally mute you either through the tab screen or by typing /mute all
4. That opponent's chat should now be bugged for the rest of the match - either italicized for "i " names or completely non-functional for "b " names

During five separate tests, we were able to reproduce the bug 100% of the time across multiple computers.

The "i " case here is obviously only a mild annoyance, but the "b " case (as shown in the video) seems potentially gamebreaking. Any player who mutes a "b " name will be unable to communicate with his or her team for the rest of the match.

Hope this helps! Thanks for your time & have a great day.