Here is a thread I found in the one plus one forum of an app that puts an overlay on the bottom part of the screen. You can adjust the tint to help eliminate the yellow bar at the bottom. So far it seems to have help quite a bit. Check it out and let me know what you think.
https://forums.oneplus.net/threads/yellow-band-software-fix-no-uv.100868/
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https://forums.oneplus.net/threads/yellow-band-software-fix-no-uv.100868/
Sent from my A0001 using Tapatalk