I think I found on issue. May not be caused by VoiceActivator....
See my this thread to understand the issue...
https://forums.macrumors.com/threads/1086479/
Only difference is Voice Control takes over the audio control here.
Steps:
(You need to add these commands).
1. Say Pandora to play Pandora.
2. While Pandora is playing again activate VC and say any other command e.g. Sleep/Lock etc.
3. VC starts takes over the audio control and after executing the command does not give it back to Pandora and Pandora stops playing.
4. If you look at the iPod/Music controls in the switcher, you will see that the controls are greyed out!!!
5. Now again launch the VC and say "Play", you will hear the feedback "Music is already playing" even though the music is not playing....weird!!!
Anyone of you has this issue?
Now sure this iOS 4.2.1 bug or Reds0w beta6 bug but this is annoying!!