Board Thread:ROBLOX help and discussion/@comment-19594653-20141204065410/@comment-26374715-20150514174501

Rd Manebog wrote: Okay, now a bug. On old but new chat versions, the chat will BUGILLY dissapear (even you try to talk: bubbles only are shown). Fixed on newer versions. Yes, I experienced this. It happened when Roblox was undergoing "maintenence" on the 13th of May, 2015. I was playing Mad Paintball(MPB) at the time, but when somebody spole, the chat stayed the same. I only realized it until when I said something, it didn't appear in the chat.

Also, other people were talking about it happening to them also. I'm positive though that it wasn't a new or recent update, since I remember not being able to use free chat in 2011(until I got my parents to verify, allowing me to |:p).