ISBoxer recently had an update to use character-servername macros because of people playing multiple characters across separate realms. Before those players had to manually tweak their macros (or completely create their own custom set). If the character-servername is conflicting, then people who aren't playing on multiple servers can likely just go into each of their Characters in ISBoxer and remove the server name from them, but I'm not entirely sure what the issue is or if that's going to fix it.