It happens if you place the CHARGE bbcode inside other bbcodes, but if you use bbcodes inside the CHARGE tag, it works fine :)
We're talking about the .-Stripped Content-. thingy, right? :p
Basically:
|BBCODES| |CHARGE| CONTENT |/CHARGE| |/BBCODES|
won't work, but
|CHARGE| |BBCODES| CONTENT...