The specific glass and its decoration may have restricted cleaning requirements. A delicate cycle is not universal approval for crystal or handmade stemware.
Understanding this situation
Some items can be physically fragile or susceptible to an altered finish. The appliance's glass programme assumes suitable glassware and correct support, rather than recognising every material automatically.
A useful next step
Follow the glassmaker's instructions and use a permitted alternative when uncertain. Do not force tall pieces into a rack or allow them to contact neighbours. If clouding or damage occurs, retain the item details and programme before treating it as a machine fault.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.