This has happened for a few months. I thought it was just my PC being a derp. A friend of mine is having the same issue. This happens for me on Windows XP, and Windows 7. My friend has: Windows 10 Pro/OS X El Capitan 10.11.6
For both of us, it happens on all computers, all operating systems, etc. Even when we are in studio logged into our accounts. It appears to be an issue linked to our account.
(doesn’t do that for DeviousDeviation though, but filter might’ve changed since the last try)
Not sure how this can happen, as it seems as if PlayerChatted doesn’t fire for the LocalPlayer. (but since everyone else can see it, their PlayerChatted just fires fine)
I guess the PlayerChatted’s built-in filter is acting very peculiar…