I was on Orc Mission 5 I think (retake dun modr, destroy red island base), and you start with a zeppelin.

I was excited to hear the "I can see my house, wish I had a weapon" line, but there's nothing... just the noises the come with movement (the whooshing sound)
Has anyone else experienced this?

I was playing on the "updated" version.

I don`t remember that the flying units had any voice lines back in the days. Are you sure you are not mistaken it with a line from Warcraft 3?

Normal behaviour. Not a bug.

Thanks!
I know I remembered it playing as a kid, but misremembered that it was one of his regular lines.

If an user has helped with your issue, you can mark his / her post, afterwards.

Which will indicate for people browsing the forum, which topics were solved, and which still require assistance.