Not really a bug, just, well I guess a buzz kill.  when you start a tactical battle in FE, you hear IMO, pretty good, exciting combat music.  then, when you check a unit by double clicking on it to see status, you hear the more lame and gentle status checking and equipping music.  When you close and go back to combat, it keeps the lame music going!  I find myself in tactical battles, never double clicking on a unit to check its status so that I can keep hearing the combat music, which I do enjoy.