Did you ever solve this? For me it sometimes stops flickering, but as soon as I switch splash screens or change some settings, it flickers again. Also, I feel like it's happening more recently.
On Auto screen mode, when I use the 3D slider, it makes it so one eye sees the video while the other sees a black screen. Am I doing something wrong? I'm playing 800x240@24fps videos, which are 16:9 aspect ratio.
Didn't expect to see another NewJeans fan here! Funnily enough, I found out about this issue while trying to watch the OMG m/v. Also, judging by your pfp, you're also a Hanni bias too?
Anyways, it seems like the app broke again recently, since I'm getting an error when trying to watch anything.