Some connected ovens require local permission before accepting certain remote actions. That can be an intended safety feature rather than a lost connection.
What the observation means
Opening the door, ending a programme or changing a setting may alter permission on particular models. The app's status should therefore be read alongside the oven's own message. A stable Wi-Fi connection does not override the appliance's operating restrictions.
A useful next step
Use the documented local procedure and ensure the cavity contains only suitable items before any remote operation. Do not bypass interlocks or repeatedly reset the account to force a start. Report the exact permission message if the approved sequence does not work.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.