the phrase as 5 is filtered

If you have chat filters enabled the phrase as 5 is filtered. But as five is not. This is a pretty common thing to say in game such as "let's take baron as 5". Or "let's group as 5". Anyway, I can only assume it's a filter meant prevent people spelling ass using 5 as an s, and bypassing the filter by saying a s s or a 5 5 etc. Maybe a special white list rule for as 5? The problem is if you have chat filters disabled you probably don't know about this and you'll say "group as 5", and the people with chat filter on will probably interpret it more as "group ****" which for all they know could be just a hurled insult like group Fword etc. Anyway just reporting the bug.