iPad screen line, seeking warranty repair

Hello!

My iPad has this horizontal/ vertical line across its screen appeared out of nowhere. I believe this was a hardware failure because the line doesn’t appears on screenshot.

This is a really strange case since I have never dropped this iPad nor having any water damage ( has case and screen protector on btw!!).

Since this device is still under warranty, I wonder if Genius Bar is willingly to repair/replace this problem for no charge. Or they’d just jumping to the conclusion of accidental damage & charging for enormous amount of money:,(