Finally, I finished the tests for the new version of my Mekel Recruitment Mod. There were some bugs that interrupted the dialogs during some cutscenes and in front of the Rakatan temple. It happened only if Zaalbar/Mekel (cutscenes) or Juhani (temple) weren't in your party.
I completely forgot it could be possible that Zaalbar is still on Kashyyyk and Mekel on Korriban during the cutscenes. Silly me.
Everything should work now.