Yes. A recess, folded part or tightly contacting surface may not receive the same wash access as an exposed face. The item's geometry and loading position matter.
Understanding this situation
Some products require disassembly or a separate cleaning method according to their maker. Dishwasher-safe material does not guarantee that every assembled channel or hidden cavity is reached.
A useful next step
Follow the complete item instructions and position suitable pieces appropriately. Inspect the actual result without tasting residues. Use another permitted method for inaccessible areas rather than adding more detergent and assuming it will reach them.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.