Challenge 2 missing narration and music

Is it just me or is challenge 2 missing sound except for effects sounds. I've played through the formicarium challenge 2 twice and both times it was in silence except effects sounds. No music, no narration, no dialogue between the scientists. The other challenges and the gateway mission seem to be fine.
 

MedinB

Colony
There is music, narration are you lying? It might be a bug. I don't THINK your lying... but I think this has to do with the music bug I've encountered before.
 
I still don't know what happens on that level. I thought it was a bug specific to challenge 2 because it was the only place I noticed a lack of sound and it happend both times I played it. But while playing through the levels a third time, I encountered the same problem on a different level (Queen of the Hill). So I guess it is just rare that there is no sound on a level and it was a coincidence that it happend twice on the same level (challenge 2). I'm going to try challenge 2 again and hope that I get sound this time.
 
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