You might possibly have it set on one button mode. If this is the case go in to the settings menu and turn if off. I don't have my gopro with me so i cant tell you how to do that, but if you look it up you could find it
same thing happened to me! sounds like its stuck on one button mode. you have to disable that. i forgot how at the moment as well but its in the manual too. makes you wonder about your friends sometimes when you tell them to just press one button and they manage to fuck it all up. lost some quality footage that day because of it.
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