A longer programme can deliberately trade time for lower energy use. The duration alone does not show that the washer is struggling, and the Eco name does not mean a quick wash.
Understanding this situation
Compare the named programmes in the manual rather than comparing only their displayed temperatures. Programme design includes heating, tumbling, soaking and rinsing, so two settings with similar labels can follow different sequences. The permitted load can also differ. A familiar machine taking substantially longer on the same programme and comparable load deserves a separate enquiry.
A useful next step
Write down the full programme name and any extra options, then distinguish an expected long cycle from a new interruption. Do not cancel simply because the initial estimate looks unfamiliar. Choose a programme suitable for the garments and the available time; do not increase temperature beyond the clothing label to compensate for a longer duration.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.