Do not add a large unfrozen load without considering capacity, packaging and the model's guidance. Creating frozen ballast is itself a freezing task.
What the observation tells you
Sealed or unsuitable containers can split as water expands, and carbonated drinks must not be used. A large load can also affect food already inside. Filling every space can block airflow or make closure difficult rather than improve operation.
A useful next step
Use the appliance only within its documented loading arrangement and freezing limits. If planning storage for an interruption, follow official guidance rather than treating added bottles as a universal solution.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.