Some combinations require water during drying, while other technologies work differently. The supply instructions for the exact model are therefore essential.
Understanding this situation
Copying advice from a separate tumble dryer can lead to an inappropriate assumption that the water supply should be off once washing ends. Conversely, a normal water requirement does not explain every unexpected leak.
A useful next step
Keep the documented supply arrangement in place for permitted operation and report any interruption. Do not loosen hoses or manipulate hidden connections as a test. If water appears outside the appliance, stop use and seek appropriate assessment.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.