Notification Window Shows For Split Second After Finger Unlock

[AC Question]

This is driving me crazy for whatever reason. Just bought my Samsung S8 yesterday. When my phone is locked (with always on display OFF) and I press the power button to show the display, followed by using my finger scanner to unlock (it has to be done in this order), I see whatever notification is pending show up in a pop up window for just a split second and disappear as the home screen is loading. Am I the only one seeing this? Thanks for your help.