If the appliance is otherwise safe, separate visible containers that touch and listen during normal operation. This checks a simple storage contact without opening machinery.
What the observation tells you
Glass bottles and loose lids can amplify a small vibration. A sound stopping after rearrangement is useful evidence, but it does not certify the entire appliance. Do not hold bottles against the rear wall or press on fixed panels while the fridge runs.
A useful next step
Keep the new arrangement within the shelf and door-pocket limits. If the noise remains, describe its position and timing along with any cooling change rather than assuming it comes from a motor.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.