I shared certificate on email.
Send me your official email, I'll share with you formally.
It's material issue or finishing issue, but these buds are not usable after spending ₹4999. And No option to return it. Because service center can...
No option to return it now.
Set resolution from UHD+ to FHD+ and Switxh it again, you'll found problem solved.
I contacted OnePlus support through Email and twitter, No response yet. I bought OnePlus buds for ₹4999 and paid ₹6000 for treatment of ear infaction...
Switch your display resolution from QHD+ to FHD+ and switch it again to QHD+ Your problem should be resolved.