One of the blenders is dying.
I can hear it. The motor runs a little rougher than the other two. There are brief skips in the sound, irregular enough to notice, rhythmic enough to unsettle. It doesn't sound broken yet. It sounds like something trying to hold a pattern it can no longer hold.
It's not a dramatic kind of entropy. It's just slightly worse until it stops working altogether.
The tricky part is that it's still making drinks. Output looks (mostly) normal. The degradation is only noticeable if you're listening for the delta between this machine and the other two. If you're new or busy or focused on just clearing the queue, you hear a blender doing its job and pour a blended drink into a cup. If you've logged enough hours with these machines, you hear a blender running out of time.
Failure is announcing itself early and quietly. The signal exists. Whether it gets read depends on who's in the room and what they've been trained to notice.
I put in a note. I won't be surprised if the machine doesn't make it through the weekend.