Oh yes, after
@H3LL5P4WN posted I realised this is not a new behaviour but a bug, so did the needful.
[doublepost=1555069826][/doublepost]
What is happening, at least for me, is that the moment I press the side button to lock the screen, a message pops up on the screen regarding the USB accessories. If I do not press the side button and leave the screen unlocked, within about 5 seconds of keeping the phone down (screen facing down) the popup comes up, nonetheless, disturbing my listening experience.
And this happens every on single instance of those two actions, pressing the button or laying the phone down. It has become annoying now.