Model #rb215lash Random unusual notices

I know nothing about your model, but in my experience with refrigerators over the last 40 years, they can make a whole range of different noises at different times. There's even a note in the manual of my GE side by side something to the effect that strange noises are to be expected. I'm amazed at the range of different sounds that comes from our 10 year old GE. It's hard to say ignore noises because I never ignore a new noise from my car, but unless the same noise repeats under similar conditions, I'd not rush into trying to 'fix; it.