[Freeswitch-users] What would cause the UUID of a Channel to Change in a Dialplan?

I'm trying to update my application to the latest version of FreeSWITCH. It uses lua to get a channel's uuid via session:getVariable("uuid") but when I do this, the uuid mysteriously changes so any uuid_XXX command I execute fails. At first I thought it might be parking the call (the next dial plan line), but removing that line did nothing either. I can tell the uuid is changed by using show channels. Does anyone have any idea what might cause a channel's uuid to change like this? Thanks. --matt