I noticed that when watching a particular YouTube video, multiple thin pink/white/blue/green vertical bars appear across the screen at random every 5 or 10 seconds or so.
Problem is only reproducible when switching video between 4k/1440p resolution AND in WiFi only.
I am sorry to hear that you are having this issue. I suggest sending an error report within 2-3 minutes of the issue occurring for this to be investigated by our research and development team. Error reports assist with identifying any deviations in your device performance. Once analyzed, our team will get back to you with a response to advise further steps.
To send an error report: Samsung Members app > Support > Error reports > select issue category > Describe issue and frequency > Tick ‘Send system log data’ > ‘Send’ in top right.
Thanks for the reply. I can confirm my friend who also has a Samsung S21 exhibits the same problem. Therefore this problem is reproducible on more than one device.
Thanks. Just to re-iterate. The issue is only reproducible if you switch from 1440p to 4k (or vice-versa) resolution whilst watching that YouTube video in WiFi only. It is also reproducible on Chrome browser as well. And it occurs on more than one S21 mobile device.
It sounds like you're experiencing vertical lines while watching YouTube videos in higher resolutions. This issue could be due to your device's graphics handling or network instability, especially when switching between 4K and 1440p.
Try clearing the app cache, updating your device, or testing on a different network. A stable connection is key for smooth streaming.
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