Yes, standby whenever it is not in use. Small amount of current except in the tube stage, so that it sounds it's best within minutes of turn on.
If you mean a slight sticking when you go to slide it open;
yes, I have noticed that also. Believe it to be that a very slight vacum is created in the chamber... but just guessing.
And on mine... I can not close the drawer completely; to the point it touches the front, I have to stop just a bit shy, but that may be a quirk of my machine. (If I do, it reads that the door is open)