Since the new animations came into practice, they've been plagued by one issue: the skeleton used in the animations is not the same as the default skeleton. As such, it will create a large number of warnings which spams the log file on every animation change.

Due to the key line: "[WARNING] [hifi.animation] animation contains joint = "artemis" which is not in the skeleton", this bug has since been referred to the "artemis" bug. This should seriously be fixed, unless people enjoy having their log files thrash their storage drives.