I don't know where to report this since it's not related to my project, so I am posting here.
I haven't used my Gear VR for a few weeks, but I've been keeping up with updates and all. Last night I was testing my project and I noticed vertical screen tearing when turning head in Oculus Home (sort of like a blink in left eye with vertical line across).
I tried several Oculus apps, and the issue was there. Also tried my app, and had the same tearing.
I never saw this issue in the past.
Using Galaxy S6, Android 6.0.1 with all the patches and updates.
I will test it tonight and will let you know. I don't think I noticed it yesterday when testing my UE4 app, but I'll double check, including in Oculus Home and Samsung/Oculus apps.