Make any social, eg /say test Place social on any hotbar Cast any spell during spell cast, click social on hotbar error: "You can't use that command right now..." After spell cast is done social will activate like normal without error. Specifically, all emergency /stopsocial /stopcast interrupts cease to function from the hotbar. You can no longer interrupt a nuke to cast a mezz, or interrupt a buff to cast a heal, etc. Curiously, you can execute commands during spell cast manually from the command line or activated from the Actions>Social form and they still work as normal - only activation from a hotbar during a spell cast do they fail. Note - Appears BRD are not affected by this, assuming because they have altered mechanics while casting. Edit: Tested on BST / CLR / ENC / PAL / MAG / SHD so far, some my own toons and others in my guild.
I found this thread interesting, as the same applied to my heals on the cleric. /tar Playername /cast 1 heals the players pet while selecting the player. Cast it again and it lands on the player now. Very odd...
are you sure you're not using /tar group x? I believe /tar group x will cycle through player and pet and is normal behavior. eg, this will target player:/tar self /tar group x this will target the players pet:/tar self /tar group x /tar group x