Class of character: Warrior
Is in a group: (Yes/No) - No
Is in a raid: (Yes/No) - No
Has a Bot spawned: (Yes/No) - No
Zone: (all or specific zone(s) - The Hidden Forest, Guild Hall, The Arena
These target dummies seem to port around when I attack them; this happens with auto attacks as well as additional attacks such as flurry or kick. They sometimes just disappear too... I was able to cause the same problems using direct damage spells on my Shaman (Sakoya) under the same conditions using the spell Ice Age (level 69), but it seems like they are not returning after casting on them... they are just gone

Vlar in The Arena however does not get knocked around or despawned when I hit him, unlike in the Forest, Guild Hall, and the parser dummies in The Arena.
These problems do not occur on live currently.