Do native speakers have trouble understanding "CAN" and "CAN'T"?

Sometimes when people say 'can't', the T sounds so subtle that I can't really tell if they are saying 'can' or 'can't', especially in songs when sometimes they're singing fast. And well, that's a pretty important information wheter the person is saying one or the other since it changes the role meaning of the phrase xD.

For instance, in the song "Blind" by Korn, there's this part when the singer says "I can't see, I'm going blind", but in my first few listens (like the first 10) I thought he was saying 'I CAN see'.

Does anyone else have the same problem?