CB

The filtering API is treating the substitutions like HTML tags, which results in their string being broken and unable to parse.

Supplied: [cb:parse function="time"][lastvisitdate][/cb:parse]
Output: [cb:parse function="time"]2015-02-24 16:48:21[/cb:parse]"

The above is CB Auto Actions parsing, but any substitution that has ATTR="VALUE" will cause this.