Random delay in waking up the screen when hitting the wake/sleep button sometimes?

[entraik]

This doesn't happen all the time, but I'm assuming it's a bug with 11.1. I use the wake/sleep button often to wake up the phone out of habit, and there are times when pressing it, that the screen doesn't wake until 3-4 after pressing the button. Sometimes it doesn't even register. Almost like a sort of 'unlock lag'... It doesn't happen all the time but randomly I've been seeing it. Anyone else? The button itself responds fine all other times though so it can't be a hardware issue. Only when waking..