The washer may recalculate the programme when a setting changes. Heating, permitted stages and selected options can influence the estimate, so a new duration immediately after a selection is not automatically a timer fault.
Understanding this situation
Compare estimates before starting only as planning information. They do not guarantee the exact finishing minute, because the machine may adjust its sequence after sensing the load or dealing with a normal operating condition. A clock that changes when you deliberately alter an option is different from an unexplained programme that repeatedly stalls once underway.
A useful next step
Choose the final programme and options before deciding whether the displayed duration is unexpected. If the cycle later fails to progress, note its last stage and any warning rather than relying only on the original estimate. Do not keep changing settings mid-cycle to chase a shorter finish; use the documented pause or cancellation instructions where necessary.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.