Real-world images of the OnePlus 12 have emerged online, highlighting its selfie camera and alert slider. Its 2K screen will have a peak brightness of at least 2,600 nits. https://www.notebookcheck.net/OnePlus-12-design-and-screen-specs-confirmed-by-new-reports.761796.0.html
Green line issue is affecting every smartphone manufacturers but only OnePlus is offering lifetime warranty on display while other manufacturers didn't even acknowledged it yet even Samsung and Apple.
Many popular youtuber made videos about this issue.
This mostly happen after software update, so it will be better to record video of the device being updated as a proof in case green line appears after update.