Pressing Escape on the "Are you sure you want to quit?" screen found by pressing "Title Screen" on the death screen will automatically respawn the player ignoring the cooldown for pressing the respawn button with mouse or Tab key.

Expected:
Nothing to happen or going back to the original red "You Died!" screen or going to the Title Screen

Note:
In 1.12.2, pressing Escape would put you back on to the red death screen from the title screen warning which doesn't happen now