05-16-2017 04:30 PM
Yes - you observed the same issue. As mattb noted before, there is no other explanation for it other than problem with GoPro 5 Black not handling colors properly. I have seen this issue time and again with other GoPro 5 Black cameras.
It is a shame that GoPro support claims they cannot see any issue.
I will be awaitning their firmware upgrade. Maybe they will finally fix it. This problem is extremely hard to fix in post processing since both green and magenta are on both side of a spectrum and shifting tint either way makes one of them better but the other worse.