It is an issue, because as your finger is making its way to tap "Back" or "Done" the notification pops under it. It's like when an ad loads directly under your

It is an issue, because as your finger is making its way to tap "Back" or "Done" the notification pops under it. It's like when an ad loads directly under your mouse cursor, overlaying something you want to click on, as the neural signal to your click-muscle is already halfway down your arm.